Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of spiral is as below...

Nummulites :: Nummulites (n.) A genus of extinct Tertiary Foraminifera, having a thin, flat, round shell, containing a large number of small chambers arranged spirally..

Bulimus :: Bulimus (n.) A genus of land snails having an elongated spiral shell, often of large size. The species are numerous and abundant in tropical America..

Solenoid :: Solenoid (n.) An electrodynamic spiral having the conjuctive wire turned back along its axis, so as to neutralize that component of the effect of the current which is due to the length of the spiral, and reduce the whole effect to that of a series of equal and parallel circular currents. When traversed by a current the solenoid exhibits polarity and attraction or repulsion, like a magnet..

Helix :: Helix (n.) A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the spiral, all the convolutions of which are in the plane..

Spirant :: Spiralozooid (n.) One of the special defensive zooids of certain hydroids. They have the form of long, slender tentacles, and bear lasso cells..

Elater :: Elater (n.) An elastic spiral filament for dispersing the spores, as in some liverworts..

Dextrorse :: Dextrorse (a.) Turning from the left to the right, in the ascending line, as in the spiral inclination of the stem of the common morning-glory..

Cingulum :: Cingulum (n.) A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells.

Umbilicus :: Umbilicus (n.) A depression or opening in the center of the base of many spiral shells.

Plagihedral :: Plagihedral (a.) Having an oblique spiral arrangement of planes, as levogyrate and dextrogyrate crystals..

Spirillum :: Spirifer (n.) Any one of numerous species of fossil brachipods of the genus Spirifer, or Delthyris, and allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side..

Truncated :: Truncated (a.) Lacking the apex; -- said of certain spiral shells in which the apex naturally drops off.

Fauces :: Fauces (n.pl.) That portion of the interior of a spiral shell which can be seen by looking into the aperture.

Twist :: Twist (v. i.) To follow a helical or spiral course; to be in the form of a helix.

Gyration :: Gyration (n.) One of the whorls of a spiral univalve shell.

Helicoid :: Helicoid (a.) Spiral; curved, like the spire of a univalve shell..

Involuted :: Involuted (a.) Rolled inward spirally.

Gyroidal :: Gyroidal (a.) Turning the plane of polarization circularly or spirally to the right or left.

Conveyor :: Conveyor (n.) A contrivance for carrying objects from place to place; esp., one for conveying grain, coal, etc., -- as a spiral or screw turning in a pipe or trough, an endless belt with buckets, or a truck running along a rope..

Spiry :: Spirulate (n.) Having the color spots, or structural parts, arranged spirally..

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