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Power :: Power (n.) The degree to which a lens, mirror, or any optical instrument, magnifies; in the telescope, and usually in the microscope, the number of times it multiplies, or augments, the apparent diameter of an object; sometimes, in microscopes, the number of times it multiplies the apparent surface..

Ellipticity :: Ellipticity (n.) Deviation of an ellipse or a spheroid from the form of a circle or a sphere; especially, in reference to the figure of the earth, the difference between the equatorial and polar semidiameters, divided by the equatorial; thus, the ellipticity of the earth is /..

Megalocyte :: Megalocyte (n.) A large, flattened corpuscle, twice the diameter of the ordinary red corpuscle, found in considerable numbers in the blood in profound anaemia..

Digit :: Digit (n.) One twelfth part of the diameter of the sun or moon; -- a term used to express the quantity of an eclipse; as, an eclipse of eight digits is one which hides two thirds of the diameter of the disk..

Trunk :: Trunk (n.) A large pipe forming the piston rod of a steam engine, of sufficient diameter to allow one end of the connecting rod to be attached to the crank, and the other end to pass within the pipe directly to the piston, thus making the engine more compact..

Calibre :: Calibre (n.) The diameter of the bore, as a cannon or other firearm, or of any tube; or the weight or size of the projectile which a firearm will carry; as, an 8 inch gun, a 12-pounder, a 44 caliber..

Diameter :: Diameter (n.) The length of a straight line through the center of an object from side to side; width; thickness; as, the diameter of a tree or rock..

Dendrometer :: Dendrometer (n.) An instrument to measure the height and diameter of trees.

Sine :: Sine (n.) The length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity.

Calibre :: Calibre (n.) The diameter of round or cylindrical body, as of a bullet or column..

Diametral :: Diametral (a.) Pertaining to a diameter; diametrical.

Tall :: Tall (superl.) High in stature; having a considerable, or an unusual, extension upward; long and comparatively slender; having the diameter or lateral extent small in proportion to the height; as, a tall person, tree, or mast..

Coccobacterium :: Coccobacterium (n.) One of the round variety of bacteria, a vegetable organism, generally less than a thousandth of a millimeter in diameter..

Incommensurable :: Incommensurable (a.) Not commensurable; having no common measure or standard of comparison; as, quantities are incommensurable when no third quantity can be found that is an aliquot part of both; the side and diagonal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable..

Jupiter :: "Jupiter (n.) One of the planets, being the brightest except Venus, and the largest of them all, its mean diameter being about 85,000 miles. It revolves about the sun in 4,332.6 days, at a mean distance of 5.2028 from the sun, the earth's mean distance being taken as unity..

Roundel :: Roundel (a.) A small circular shield, sometimes not more than a foot in diameter, used by soldiers in the fourteenth and fifteenth centuries..

Longitudinal :: Longitudinal (a.) Extending in length; in the direction of the length; running lengthwise, as distinguished from transverse; as, the longitudinal diameter of a body..

Measure :: Measure (v. i.) To be of a certain size or quantity, or to have a certain length, breadth, or thickness, or a certain capacity according to a standard measure; as, cloth measures three fourths of a yard; a tree measures three feet in diameter..

Slug :: Slug (v. i.) To become reduced in diameter, or changed in shape, by passing from a larger to a smaller part of the bore of the barrel; -- said of a bullet when fired from a gun, pistol, or other firearm..

Dynameter :: Dynameter (n.) An instrument for determining the magnifying power of telescopes, consisting usually of a doubleimage micrometer applied to the eye end of a telescope for measuring accurately the diameter of the image of the object glass there formed; which measurement, compared with the actual diameter of the glass, gives the magnifying power..

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