Definition of Spiral shell. Meaning of Spiral shell. Synonyms of Spiral shell
Here you will find one or more explanations in English for the word Spiral shell. Also in the bottom left of the page several parts of wikipedia pages related to the word Spiral shell and, of course, Spiral shell synonyms and on the right images related to the word Spiral shell.
Definition of Spiral shell
Spiral shellSpiral Spi"ral, a. [Cf. F. spiral. See Spire a winding
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
3. (Geom.) Of or pertaining to a spiral; like a spiral.
Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.
Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
Spiral operculum, an operculum whih has spiral lines of
Spiral shell, any shell in which the whorls form a spiral
Spiral spring. See the Note under Spring, n., 4.
Meaning of Spiral shell from wikipedia
- seas**** or sea s****
, also known simply
as a s****
, is a hard, protective outer layer created
by an animal
in the sea. The s****
is part of the...
- Archimedean spiral hyperbolic spiral
Fermat's spiral lituus logarithmic spiral Cornu spiral spiral
of Theodorus Fibonacci Spiral
) The involute...
, although again
none of them are (necessarily) golden spirals
. It is sometimes stated
that spiral galaxies
and nautilus s****
- or other s****
. Most gastropod s****
coiled. The majority
(over 90%) of gastropod species
, but a small...
- logarithmic spiral
, equiangular spiral
, or growth spiral
is a self-similar spiral curve which often appears
in nature. The logarithmic spiral
Gr**** κοχλίας (kokhlias), meaning
, snail s****
'. The cochlea
(plural is cochleae) is a spiralled
, hollow, conical chamber
of bone, in which...
- in the spiral growth
of a mollusc s****
. A spiral configuration
of the s****
in of numerous
gastropods, but it is also found
- (peanut s****
)-shaped structures which typically
have a maximum visibility
at half the length
of the in-plane bar. The bulk of the stars
in a spiral
- Thus the s**** gradually becomes longer
and wider, in an increasing spiral
shape, to better accommodate
the growing animal
inside. The s****
- The s****
, when cut away, reveals
of lustrous nacre
a nearly perfect equiangular spiral
it is not a golden spiral
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