Definition of spiral

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Spiral (a.) Winding round a cylinder or imaginary axis, and at the same time rising or advancing forward; winding like the thread of a screw; helical..

Lern More About Spiral

Antidromous :: Antidromous (a.) Changing the direction in the spiral sequence of leaves on a stem.
Reversed :: Reversed (a.) Turned side for side, or end for end; changed to the contrary; specifically (Bot. & Zool.), sinistrorse or sinistral; as, a reversed, or sinistral, spiral or shell..
Auger :: Auger (n.) A carpenter's tool for boring holes larger than those bored by a gimlet. It has a handle placed crosswise by which it is turned with both hands. A pod auger is one with a straight channel or groove, like the half of a bean pod. A screw auger has a twisted blade, by the spiral groove of which the chips are discharge..
Spiring :: Spirillum (n.) A genus of common motile microorganisms (Spirobacteria) having the form of spiral-shaped filaments. One species is said to be the cause of relapsing fever.
Heterodromous :: Heterodromous (a.) Having spirals of changing direction.
Caracole :: Caracole (n.) A staircase in a spiral form.
Taenidium :: Taenidium (n.) The chitinous fiber forming the spiral thread of the tracheae of insects. See Illust. of Trachea.
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..
Triton :: Triton (n.) Any one of many species of marine gastropods belonging to Triton and allied genera, having a stout spiral shell, often handsomely colored and ornamented with prominent varices. Some of the species are among the largest of all gastropods. Called also trumpet shell, and sea trumpet..
Cingulum :: Cingulum (n.) A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells.
Spirally :: Spirality (n.) The quality or states of being spiral.
Turnip-shell :: Turnip-shell (n.) Any one of several large, thick, spiral marine shells belonging to Rapa and allied genera, somewhat turnip-shaped..
Twisted :: Twisted (a.) Contorted; crooked spirally; subjected to torsion; hence, perverted..
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..
Helical :: Helical (a.) Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring..
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..
Spiral :: Spiral (a.) Winding or circling round a center or pole and gradually receding from it; as, the spiral curve of a watch spring..
Ganoidei :: Ganoidei (n. pl.) One of the subclasses of fishes. They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma. Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales..
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..
Fauces :: Fauces (n.pl.) That portion of the interior of a spiral shell which can be seen by looking into the aperture.
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