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Axis of oscillationOscillation Os`cil*la"tion, n. [L. oscillatio a swinging.]
1. The act of oscillating; a swinging or moving backward and
forward, like a pendulum; vibration.
2. Fluctuation; variation; change back and forth.
His mind oscillated, undoubtedly; but the extreme
points of the oscillation were not very remote.
--Macaulay.
Axis of oscillation, Center of oscillation. See under
Axis, and Center. Axis of oscillationAxis Ax"is, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
4. (Anat.)
(a) The second vertebra of the neck, or vertebra
dentata.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
6. (Fine Arts) The primary or secondary central line of any
design.
Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.
Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.
Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.
Axis in peritrochio, the wheel and axle, one of the
mechanical powers.
Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a principal
axis, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the minor
axis, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.
Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.
Axis of a telescope or microscope, the straight line with
which coincide the axes of the several lenses which
compose it.
Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.
Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.
Axis of a balance, that line about which it turns.
Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.
Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.
Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.
Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.
Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.
Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.
Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.
Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.
Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.
Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.
Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.
Axis of abscissas and Axis of ordinates. See Abscissa. Center of oscillationOscillation Os`cil*la"tion, n. [L. oscillatio a swinging.]
1. The act of oscillating; a swinging or moving backward and
forward, like a pendulum; vibration.
2. Fluctuation; variation; change back and forth.
His mind oscillated, undoubtedly; but the extreme
points of the oscillation were not very remote.
--Macaulay.
Axis of oscillation, Center of oscillation. See under
Axis, and Center. Center of oscillationCenter Cen"ter, n. [F. centre, fr. L. centrum, fr. round which
a circle is described, fr. ? to prick, goad.]
1. A point equally distant from the extremities of a line,
figure, or body, or from all parts of the circumference of
a circle; the middle point or place.
2. The middle or central portion of anything.
3. A principal or important point of concentration; the
nucleus around which things are gathered or to which they
tend; an object of attention, action, or force; as, a
center of attaction.
4. The earth. [Obs.] --Shak.
5. Those members of a legislative assembly (as in France) who
support the existing government. They sit in the middle of
the legislative chamber, opposite the presiding officer,
between the conservatives or monarchists, who sit on the
right of the speaker, and the radicals or advanced
republicans who occupy the seats on his left, See Right,
and Left.
6. (Arch.) A temporary structure upon which the materials of
a vault or arch are supported in position until the work
becomes self-supporting.
7. (Mech.)
(a) One of the two conical steel pins, in a lathe, etc.,
upon which the work is held, and about which it
revolves.
(b) A conical recess, or indentation, in the end of a
shaft or other work, to receive the point of a center,
on which the work can turn, as in a lathe.
Note: In a lathe the
live center is in the spindle of the head stock; the
dead center is on the tail stock.
Planer centers are stocks carrying centers, when the object
to be planed must be turned on its axis.
Center of an army, the body or troops occupying the place
in the line between the wings.
Center of a curve or surface (Geom.)
(a) A point such that every line drawn through the point
and terminated by the curve or surface is bisected at
the point.
(b) The fixed point of reference in polar co["o]rdinates.
See Co["o]rdinates.
Center of curvature of a curve (Geom.), the center of that
circle which has at any given point of the curve closer
contact with the curve than has any other circle whatever.
See Circle.
Center of a fleet, the division or column between the van
and rear, or between the weather division and the lee.
Center of gravity (Mech.), that point of a body about which
all its parts can be balanced, or which being supported,
the whole body will remain at rest, though acted upon by
gravity.
Center of gyration (Mech.), that point in a rotating body
at which the whole mass might be concentrated
(theoretically) without altering the resistance of the
intertia of the body to angular acceleration or
retardation.
Center of inertia (Mech.), the center of gravity of a body
or system of bodies.
Center of motion, the point which remains at rest, while
all the other parts of a body move round it.
Center of oscillation, the point at which, if the whole
matter of a suspended body were collected, the time of
oscillation would be the same as it is in the actual form
and state of the body.
Center of percussion, that point in a body moving about a
fixed axis at which it may strike an obstacle without
communicating a shock to the axis.
Center of pressure (Hydros.), that point in a surface
pressed by a fluid, at which, if a force equal to the
whole pressure and in the same line be applied in a
contrary direction, it will balance or counteract the
whole pressure of the fluid. Oscillancy
Oscillancy Os"cil*lan*cy, n.
The state of oscillating; a seesaw kind of motion. [R.]
OscillariaOscillaria Os`cil*la"ri*a, n. [NL., fr. L. oscillare to
swing.] (Bot.)
A genus of dark green, or purplish black, filamentous,
fresh-water alg[ae], the threads of which have an automatic
swaying or crawling motion. Called also Oscillatoria. OscillateOscillate Os"cil*late, v. i. [imp. & p. p. Oscillated; p.
pr. & vb. n. Oscillating.] [L. oscillare to swing, fr.
oscillum a swing, a little mask or puppet made to be hung
from trees and swing in the wind, prob. orig., a little
mouth, a dim. from os mouth. See Oral, and cf. Osculate.]
1. To move backward and forward; to vibrate like a pendulum;
to swing; to sway.
2. To vary or fluctuate between fixed limits; to act or move
in a fickle or fluctuating manner; to change repeatedly,
back and forth.
The amount of superior families oscillates rather
than changes, that is, it fluctuates within fixed
limits. --Dc Quincey. OscillatedOscillate Os"cil*late, v. i. [imp. & p. p. Oscillated; p.
pr. & vb. n. Oscillating.] [L. oscillare to swing, fr.
oscillum a swing, a little mask or puppet made to be hung
from trees and swing in the wind, prob. orig., a little
mouth, a dim. from os mouth. See Oral, and cf. Osculate.]
1. To move backward and forward; to vibrate like a pendulum;
to swing; to sway.
2. To vary or fluctuate between fixed limits; to act or move
in a fickle or fluctuating manner; to change repeatedly,
back and forth.
The amount of superior families oscillates rather
than changes, that is, it fluctuates within fixed
limits. --Dc Quincey. OscillatingOscillate Os"cil*late, v. i. [imp. & p. p. Oscillated; p.
pr. & vb. n. Oscillating.] [L. oscillare to swing, fr.
oscillum a swing, a little mask or puppet made to be hung
from trees and swing in the wind, prob. orig., a little
mouth, a dim. from os mouth. See Oral, and cf. Osculate.]
1. To move backward and forward; to vibrate like a pendulum;
to swing; to sway.
2. To vary or fluctuate between fixed limits; to act or move
in a fickle or fluctuating manner; to change repeatedly,
back and forth.
The amount of superior families oscillates rather
than changes, that is, it fluctuates within fixed
limits. --Dc Quincey. OscillatingOscillating Os"cil*la`ting, a.
That oscillates; vibrating; swinging.
Oscillating engine, a steam engine whose cylinder
oscillates on trunnions instead of being permanently fixed
in a perpendicular or other direction. --Weale. Oscillating current
Oscillating current Os"cil*lat`ing current (Elec.)
A current alternating in direction.
Oscillating engineOscillating Os"cil*la`ting, a.
That oscillates; vibrating; swinging.
Oscillating engine, a steam engine whose cylinder
oscillates on trunnions instead of being permanently fixed
in a perpendicular or other direction. --Weale. OscillationOscillation Os`cil*la"tion, n. [L. oscillatio a swinging.]
1. The act of oscillating; a swinging or moving backward and
forward, like a pendulum; vibration.
2. Fluctuation; variation; change back and forth.
His mind oscillated, undoubtedly; but the extreme
points of the oscillation were not very remote.
--Macaulay.
Axis of oscillation, Center of oscillation. See under
Axis, and Center. Oscillative
Oscillative Os"cil*la*tive, a.
Tending to oscillate; vibratory. [R.] --I. Taylor.
Oscillator
Oscillator Os"cil*la`tor, n.
One that oscillates; specif.:
(a) (Elec.) Any device for producing electric oscillations;
esp., an apparatus for generating electric waves in a
system of wireless telegraphy.
(b) (Mech.) An instrument for measuring rigidity by the
torsional oscillations of a weighted wire.
OscillatoriaOscillaria Os`cil*la"ri*a, n. [NL., fr. L. oscillare to
swing.] (Bot.)
A genus of dark green, or purplish black, filamentous,
fresh-water alg[ae], the threads of which have an automatic
swaying or crawling motion. Called also Oscillatoria. OscillatoryOscillatory Os"cil*la*to*ry, a. [Cf. F. oscillatoire. See
Oscillate.]
Moving, or characterized by motion, backward and forward like
a pendulum; swinging; oscillating; vibratory; as, oscillatory
motion.
Meaning of Oscilla from wikipedia
- For the
genus of
marine molluscs, see
Oscilla (gastropod).
Oscilla is a word
applied in
Latin usage to
small figures, most
commonly masks or faces, which...
-
Monoptygma (
Oscilla) cingulata)
Oscilla circinata A. Adams, 1867
Oscilla composita Peñas & Rolán, 2017
Oscilla cylindrica de Folin, 1879)
Oscilla duplex Laseron...
-
Oscilla galilae is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. This
species occurs in...
-
Oscilla aquilonia is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. The
length of the s****...
-
Oscilla notialis is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. The
length of the s****...
-
Oscilla ficara is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. Rosenberg, G. (2012)....
-
Oscilla circinata is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. The elongate-oval s****...
-
Oscilla annulata is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. The
length of the whitish...
-
Oscilla tornata is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. The
length of the s****...
-
Oscilla tricordata is a
species of sea snail, a
marine gastropod mollusk in the
family Pyramidellidae, the
pyrams and
their allies. This
marine species...
