Definition of axis

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Axis (n.) A straight line with respect to which the different parts of a magnitude are symmetrically arranged; as, the axis of a cylinder, i. e., the axis of a cone, that is, the straight line joining the vertex and the center of the base; the axis of a circle, any straight line passing through the center..

Lern More About Axis

Clinodiagonal :: Clinodiagonal (n.) That diagonal or lateral axis in a monoclinic crystal which makes an oblique angle with the vertical axis. See Crystallization.
Y :: Y (n.) One of the forked holders for supporting the telescope of a leveling instrument, or the axis of a theodolite; a wye..
Circumduction :: Circumduction (n.) The rotation of a limb round an imaginary axis, so as to describe a concial surface..
Rhachis :: Rhachis (n.) The principal axis in a raceme, spike, panicle, or corymb..
Eccentricity :: Eccentricity (n.) The ratio of the distance of the center of the orbit of a heavenly body from the center of the body round which it revolves to the semi-transverse axis of the orbit.
Chittra :: Chittra (n.) The axis deer of India.
Neurokeratin :: Neurokeratin (n.) A substance, resembling keratin, present in nerve tissue, as in the sheath of the axis cylinder of medullated nerve fibers. Like keratin it resists the action of most chemical agents, and by decomposition with sulphuric acid yields leucin and tyrosin..
Ellipse :: Ellipse (n.) An oval or oblong figure, bounded by a regular curve, which corresponds to an oblique projection of a circle, or an oblique section of a cone through its opposite sides. The greatest diameter of the ellipse is the major axis, and the least diameter is the minor axis. See Conic section, under Conic, and cf. Focus..
Myelencephalon :: Myelencephalon (n.) The brain and spinal cord; the cerebro-spinal axis; the neuron. Sometimes abbreviated to myelencephal.
Tubicorn :: Tubicorn (n.) Any ruminant having horns composed of a bony axis covered with a horny sheath; a hollow-horned ruminant.
Adduction :: Adduction (n.) The action by which the parts of the body are drawn towards its axis]; -- opposed to abduction.
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..
Screw :: Screw (n.) A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or,
Dispart :: Dispart (n.) A piece of metal placed on the muzzle, or near the trunnions, on the top of a piece of ordnance, to make the line of sight parallel to the axis of the bore; -- called also dispart sight, and muzzle sight..
Eccentric :: Eccentric (n.) A circle described about the center of an elliptical orbit, with half the major axis for radius..
Occipitoaxial :: Occipitoaxial (a.) Of or pertaining to the occipital bone and second vertebra, or axis..
Abduction :: Abduction (n.) The movement which separates a limb or other part from the axis, or middle line, of the body..
Rotator :: Rotator (n.) that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis..
Pinion :: Pinion (n.) A cogwheel with a small number of teeth, or leaves, adapted to engage with a larger wheel, or rack (see Rack); esp., such a wheel having its leaves formed of the substance of the arbor or spindle which is its axis..
Quadrature :: Quadrature (a.) The act of squaring; the finding of a square having the same area as some given curvilinear figure; as, the quadrature of a circle; the operation of finding an expression for the area of a figure bounded wholly or in part by a curved line, as by a curve, two ordinates, and the axis of abscissas..
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