Definition of Spiral operculum. Meaning of Spiral operculum. Synonyms of Spiral operculum
Here you will find one or more explanations in English for the word Spiral operculum. Also in the bottom left of the page several parts of wikipedia pages related to the word Spiral operculum and, of course, Spiral operculum synonyms and on the right images related to the word Spiral operculum.
Definition of Spiral operculum
Spiral operculumSpiral 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 operculum from wikipedia
of the articulated operculum
is not so evident
as in Navicella Example
of a concentric operculum
(Filopaludina martensi) Example...
- When an opposing tooth bites
into the operculum
, it can initiate
or exacerbate pericoronitis resulting
in a spiraling cycle
and trauma. Over-eruption...
- The spiral
brumbyi, is a species
of freshwater snail
with an operculum
, an aquatic gastropod mollusk
in the family...
- nucleus measures
one-third the distance across
the face. The operculum itself bears
a deep, spiral groove
and is also granular
on the convex outer
the fin with lepidotrichia
(bone fin rays). They also have an operculum
, which helps
them breathe without having
to swim. Bony fish have no placoid...
- main conical
s**** (previously referred
to as a ‘conch’) and a cap-like operculum
. Some also had two curved supports known
They are calcareous...
to the two chromatically
structures, the most common feature
seen by divers. The multicolored spirals
are highly derived structures
- "common tower
s****" is a species
of medium-sized sea snails
with an operculum
, marine gastropod mollusks
in the family
Turritellidae. This species
has been little published
on this species. This species
has a green operculum
. The size of the s**** varies between
35 mm and 70 mm. The depressed,...
- with oil glands, and sepals
that are fused
to form a "cap" or operculum
over the stamens. The fruit
is a woody capsule commonly referred
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