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 shell
Spiral Spi"ral, a. [Cf. F. spiral. See Spire a winding line.] 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 parallel. Spiral operculum, an operculum whih has spiral lines of growth. Spiral shell, any shell in which the whorls form a spiral or helix. Spiral spring. See the Note under Spring, n., 4.

Meaning of Spiral shell from wikipedia

- sea s****, also known simply as a s****, is a hard, protective outer layer usually created by an animal or organism that lives in the sea. The s**** is...
- or other s****. Most gastropod s**** are spirally coiled. The majority (over 90%) of gastropod species have dextral (right-handed) s****, but a small...
- In geometry, a golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets wider (or further from...
- Ammonoids are extinct spiral s****ed cephalopods comprising the subclass Ammonoidea. They are more closely related to living coleoids (i.e., octopuses...
- derives from Ancient Gr**** κοχλίας (kokhlias) 'spiral, snail s****'. The cochlea (pl.: cochleae) is a spiraled, hollow, conical chamber of bone, in which...
- spiral, equiangular spiral, or growth spiral is a self-similar spiral curve that often appears in nature. The first to describe a logarithmic spiral was...
- thought to reflect the asymmetry of hermit crabs, which must fit into a spiral s****. Although formerly classified among the hermit crabs in the superfamily...
- a spiral-shaped pattern. Bone tissue is shown. For mollusc whorls, the body whorl in a mollusc s**** is the most recently formed whorl of a spiral s****...
- Archimedean spiral hyperbolic spiral Fermat's spiral lituus logarithmic spiral Cornu spiral spiral of Theodorus Fibonacci Spiral (golden spiral) The involute...
- the spiral or whorled growth of a mollusc s****. A spiral configuration of the s**** is found in numerous gastropods, but it is also found in s****ed cephalopods...