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

Urochord :: Urochord (n.) The central axis or cord in the tail of larval ascidians and of certain adult tunicates.
Beam :: Beam (n.) A heavy iron lever having an oscillating motion on a central axis, one end of which is connected with the piston rod from which it receives motion, and the other with the crank of the wheel shaft; -- called also working beam or walking beam..
Solenoid :: Solenoid (n.) An electrodynamic spiral having the conjuctive wire turned back along its axis, so as to neutralize that component of the effect of the current which is due to the length of the spiral, and reduce the whole effect to that of a series of equal and parallel circular currents. When traversed by a current the solenoid exhibits polarity and attraction or repulsion, like a magnet..
Core :: Core (n.) The bony process which forms the central axis of the horns in many animals.
Semilens :: Semilens (n.) The half of a lens divided along a plane passing through its axis.
Sympodia :: Sympodial (a.) Composed of superposed branches in such a way as to imitate a simple axis; as, a sympodial stem..
Hypaxial :: Hypaxial (a.) Beneath the axis of the skeleton; subvertebral; hyposkeletal.
Gimbals :: Gimbals (n.) A contrivance for permitting a body to incline freely in all directions, or for suspending anything, as a barometer, ship's compass, chronometer, etc., so that it will remain plumb, or level, when its support is tipped, as by the rolling of a ship. It consists of a ring in which the body can turn on an axis through a diameter of the ring, while the ring itself is so pivoted to its support that it can turn about a diameter at right angles to the first..
Gyrate :: Gyrate (n.) To revolve round a central point; to move spirally about an axis, as a tornado; to revolve..
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..
Multiaxial :: Multiaxial (a.) Having more than one axis; developing in more than a single line or plain; -- opposed to monoaxial.
Galvanotropism :: Galvanotropism (n.) The tendency of a root to place its axis in the line of a galvanic current.
Rotatory :: Rotatory (a.) Turning as on an axis; rotary.
Macrodome :: Macrodome (n.) A dome parallel to the longer lateral axis of an orthorhombic crystal. See Dome, n., 4..
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..
Interaxis :: Interaxis (n.) The space between two axes. See Axis, 6..
Drumlin :: Drumlin (n.) A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion..
Phyllotaxis :: Phyllotaxis (n.) The order or arrangement of leaves on the stem; the science of the relative position of leaves.
Monoclinic :: Monoclinic (a.) Having one oblique intersection; -- said of that system of crystallization in which the vertical axis is inclined to one, but at right angles to the other, lateral axis. See Crystallization..
Pitch :: Pitch (n.) The length, measured along the axis, of a complete turn of the thread of a screw, or of the helical lines of the blades of a screw propeller..
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