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Trachelipoda :: Trachelipoda (n.pl.) An extensive artificial group of gastropods comprising all those which have a spiral shell and the foot attached to the base of the neck.

Tube :: Tube (n.) A more or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm..

Turrilite :: Turrilite (n.) Any fossil ammonite of the genus Turrilites. The shell forms an open spiral with the later whorls separate.

Antidromous :: Antidromous (a.) Changing the direction in the spiral sequence of leaves on a stem.

Winkle :: Winkle (n.) Any one of various marine spiral gastropods, esp., in the United States, either of two species of Fulgar (F. canaliculata, and F. carica)..

Volute :: Volute (n.) A spiral turn, as in certain shells..

Sasin :: Sasin (n.) The Indian antelope (Antilope bezoartica, / cervicapra), noted for its beauty and swiftness. It has long, spiral, divergent horns..

Cochlea :: Cochlea (n.) An appendage of the labyrinth of the internal ear, which is elongated and coiled into a spiral in mammals. See Ear..

Curl :: Curl (v. i.) To move in curves, spirals, or undulations; to contract in curving outlines; to bend in a curved form; to make a curl or curls..

Anisopleura :: Anisopleura (n. pl.) A primary division of gastropods, including those having spiral shells. The two sides of the body are unequally developed..

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

Trica :: Trica (n.) An apothecium in certain lichens, having a spherical surface marked with spiral or concentric ridges and furrows..

Spiry :: Spiry (a.) Of a spiral form; wreathed; curled; serpentine.

Gyrate :: Gyrate (n.) To revolve round a central point; to move spirally about an axis, as a tornado; to revolve..

Slit-shell :: Slit-shell (n.) Any species of Pleurotomaria, a genus of beautiful, pearly, spiral gastropod shells having a deep slit in the outer lip. Many fossil species are known, and a few living ones are found in deep water in tropical seas..

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..

Serpula :: Serpula (n.) Any one of numerous species of tubicolous annelids of the genus Serpula and allied genera of the family Serpulidae. They secrete a calcareous tube, which is usually irregularly contorted, but is sometimes spirally coiled. The worm has a wreath of plumelike and often bright-colored gills around its head, and usually an operculum to close the aperture of its tube when it retracts..

Angienchyma :: Angienchyma (n.) Vascular tissue of plants, consisting of spiral vessels, dotted, barred, and pitted ducts, and laticiferous vessels..

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

Triseriate :: Triseriate (a.) Arranged in three vertical or spiral rows.

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