Definition of spiral

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Spiraeic (a.) Of, pertaining to, or derived from, the meadowsweet (Spiraea); formerly, designating an acid which is now called salicylic acid..

Lern More About Spiral

Gyroidal :: Gyroidal (a.) Having the planes arranged spirally, so that they incline all to the right (or left) of a vertical line; -- said of certain hemihedral forms..
Helicograph :: Helicograph (n.) An instrument for drawing spiral lines on a plane.
Tympanum :: Tympanum (n.) A drum-shaped wheel with spirally curved partitions by which water is raised to the axis when the wheel revolves with the lower part of the circumference submerged, -- used for raising water, as for irrigation..
Spire :: Spire (n.) A spiral; a curl; a whorl; a twist.
Worm :: Worm (n.) A spiral instrument or screw, often like a double corkscrew, used for drawing balls from firearms..
Turreted :: Turreted (a.) Furnished with a turret or turrets; specifically (Zool.), having the whorls somewhat flattened on the upper side and often ornamented by spines or tubercles; -- said of certain spiral shells..
Gyration :: Gyration (n.) One of the whorls of a spiral univalve shell.
Helicine :: Helicine (a.) Curled; spiral; helicoid; -- applied esp. to certain arteries of the penis.
Curlycue :: Curlycue (n.) Some thing curled or spiral,, as a flourish made with a pen on paper, or with skates on the ice; a trick; a frolicsome caper..
Multispiral :: Multispiral (a.) Having numerous spiral coils round a center or nucleus; -- said of the opercula of certain shells.
Heliciform :: Heliciform (a.) Having the form of a helix; spiral.
Antidromous :: Antidromous (a.) Changing the direction in the spiral sequence of leaves on a stem.
Spiral :: Spiral (a.) Winding or circling round a center or pole and gradually receding from it; as, the spiral curve of a watch spring..
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..
Gyroidal :: Gyroidal (a.) Spiral in arrangement or action.
Spirally :: Spirality (n.) The quality or states of being spiral.
Hydractinian :: Hydractinian (n.) Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata..
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..
Rissoid :: Rissoid (n.) Any one of very numerous species of small spiral gastropods of the genus Rissoa, or family Rissoidae, found both in fresh and salt water..
Ladies'' Tresses :: Ladies' tresses () A name given to several species of the orchidaceous genus Spiranthes, in which the white flowers are set in spirals about a slender axis and remotely resemble braided hair..
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