Definition of axis

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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..

Lern More About Axis

Rotator :: Rotator (n.) that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis..
Spina Bifida :: Spin (n.) Velocity of rotation about some specified axis.
Columella :: Columella (n.) A columnlike axis in the capsules of mosses.
Spin :: Spin (v. i.) To move round rapidly; to whirl; to revolve, as a top or a spindle, about its 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..
Synteresis :: Synteresis (n.) Prophylaxis.
Band :: Band (v. t.) A stripe, streak, or other mark transverse to the axis of the body..
Parietal :: Parietal (a.) Attached to the main wall of the ovary, and not to the axis; -- said of a placenta..
Gyration :: Gyration (n.) The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution..
Spike :: Spike (n.) A kind of flower cluster in which sessile flowers are arranged on an unbranched elongated axis.
Trundlehead :: Trundlehead (n.) The drumhead of a capstan; especially, the drumhead of the lower of two capstans on the sane axis..
Sclerobase :: Sclerobase (n.) The calcareous or hornlike coral forming the central stem or axis of most compound alcyonarians; -- called also foot secretion. See Illust. under Gorgoniacea, and Coenenchyma..
Fly :: Fly (v. i.) A heavy wheel, or cross arms with weights at the ends on a revolving axis, to regulate or equalize the motion of machinery by means of its inertia, where the power communicated, or the resistance to be overcome, is variable, as in the steam engine or the coining press. See Fly wheel (below)..
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..
Epimere :: Epimere (n.) One of the segments of the transverse axis, or the so called homonymous parts; as, for example, one of the several segments of the extremities in vertebrates, or one of the similar segments in plants, such as the segments of a segmented leaf..
Axis :: Axis (n.) One of several imaginary lines, assumed in describing the position of the planes by which a crystal is bounded..
Feather :: Feather (n.) The angular adjustment of an oar or paddle-wheel float, with reference to a horizontal axis, as it leaves or enters the water..
Vane :: Vane (n.) Any flat, extended surface attached to an axis and moved by the wind; as, the vane of a windmill; hence, a similar fixture of any form moved in or by water, air, or other fluid; as, the vane of a screw propeller, a fan blower, an anemometer, etc..
Macrodome :: Macrodome (n.) A dome parallel to the longer lateral axis of an orthorhombic crystal. See Dome, n., 4..
Scalene :: Scalene (a.) Having the axis inclined to the base, as a cone..
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