Definition of axis

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Axis (n.) The stem; the central part, or longitudinal support, on which organs or parts are arranged; the central line of any body..

Lern More About Axis

Vortex :: Vortex (n.) A supposed collection of particles of very subtile matter, endowed with a rapid rotary motion around an axis which was also the axis of a sun or a planet. Descartes attempted to account for the formation of the universe, and the movements of the bodies composing it, by a theory of vortices..
Axis :: Axis (n.) Also used of the body only of the vertebra, which is prolonged anteriorly within the foramen of the first vertebra or atlas, so as to form the odontoid process or peg which serves as a pivot for the atlas and head to turn upon..
Gnomon :: Gnomon (n.) The style or pin, which by its shadow, shows the hour of the day. It is usually set parallel to the earth's axis..
Gorgonia :: Gorgonia (n.) A genus of Gorgoniacea, formerly very extensive, but now restricted to such species as the West Indian sea fan (Gorgonia flabellum), sea plume (G. setosa), and other allied species having a flexible, horny axis..
Axial :: Axial (a.) Belonging to the axis of the body; as, the axial skeleton; or to the axis of any appendage or organ; as, the axial bones..
Ginglymodi :: Ginglymodi (n.) An order of ganoid fishes, including the modern gar pikes and many allied fossil forms. They have rhombic, ganoid scales, a heterocercal tail, paired fins without an axis, fulcra on the fins, and a bony skeleton, with the vertebrae convex in front and concave behind, forming a ball and socket joint. See Ganoidel..
Swivel :: Swivel (a.) A piece, as a ring or hook, attached to another piece by a pin, in such a manner as to permit rotation about the pin as an axis..
Neuroskeleton :: Neuroskeleton (n.) The deep-seated parts of the vertebrate skeleton which are relation with the nervous axis and locomation.
Parietal :: Parietal (a.) Attached to the main wall of the ovary, and not to the axis; -- said of a placenta..
Trochoid :: Trochoid (a.) Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.
Spinetail :: Spinetail (n.) Any one of several species of South American and Central American clamatorial birds belonging to Synallaxis and allied genera of the family Dendrocolaptidae. They are allied to the ovenbirds.
Knife-edge :: Knife-edge (n.) A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam, or other piece required to oscillate with the least possible friction..
Interaxal :: Interaxal (a.) Situated in an interaxis.
Gorgoniacea :: Gorgoniacea (n. pl.) One of the principal divisions of Alcyonaria, including those forms which have a firm and usually branched axis, covered with a porous crust, or c/nenchyma, in which the polyp cells are situated..
Corticifer :: Corticifer (n.) One of the Gorgoniacea; -- so called because the fleshy part surrounds a solid axis, like a bark..
Cephalocercal :: Cephalocercal (a.) Relating to the long axis of the body.
Conoid :: Conoid (n.) A solid formed by the revolution of a conic section about its axis; as, a parabolic conoid, elliptic conoid, etc.; -- more commonly called paraboloid, ellipsoid, etc..
Eccentricity :: Eccentricity (n.) The distance of the center of figure of a body, as of an eccentric, from an axis about which it turns; the throw..
Rotation :: Rotation (n.) The act of turning, as a wheel or a solid body on its axis, as distinguished from the progressive motion of a revolving round another body or a distant point; thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution..
Diaphysis :: Diaphysis (n.) An abnormal prolongation of the axis of inflorescence.
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