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Maara Shell :: Maara shell () A large, pearly, spiral, marine shell (Turbo margaritaceus), from the Pacific Islands. It is used as an ornament..

Stentor :: Stentor (n.) Any species of ciliated Infusoria belonging to the genus Stentor and allied genera, common in fresh water. The stentors have a bell-shaped, or cornucopia-like, body with a circle of cilia around the spiral terminal disk. See Illust. under Heterotricha..

Worm :: Worm (n.) Anything spiral, vermiculated, or resembling a worm.

Valvata :: Valvata (n.) A genus of small spiral fresh-water gastropods having an operculum.

Spiral :: Spiral (a.) Of or pertaining to a spiral; like a spiral.

Volute :: Volute (n.) A spiral scroll which forms the chief feature of the Ionic capital, and which, on a much smaller scale, is a feature in the Corinthian and Composite capitals. See Illust. of Capital, also Helix, and Stale..

Revolution :: Revolution (n.) Return to a point before occupied, or to a point relatively the same; a rolling back; return; as, revolution in an ellipse or spiral..

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

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

Curl :: Curl (v.) A ringlet, especially of hair; anything of a spiral or winding form..

Spink :: Spinii-spirulate (a.) Having spines arranged spirally. See Spicule.

Sinistral :: Sinistral (a.) Having the whorls of the spire revolving or rising to the left; reversed; -- said of certain spiral shells.

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

Limacina :: Limacina (n.) A genus of small spiral pteropods, common in the Arctic and Antarctic seas. It contributes to the food of the right whales..

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

Screw :: Screw (n.) A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or,

Chank :: Chank (n.) The East Indian name for the large spiral shell of several species of sea conch much used in making bangles, esp. Turbinella pyrum. Called also chank chell..

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

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

Gyratory :: Gyratory (a.) Moving in a circle, or spirally; revolving; whirling around..

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