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Endogen :: Endogen (n.) A plant which increases in size by internal growth and elongation at the summit, having the wood in the form of bundles or threads, irregularly distributed throughout the whole diameter, not forming annual layers, and with no distinct pith. The leaves of the endogens have, usually, parallel veins, their flowers are mostly in three, or some multiple of three, parts, and their embryos have but a single cotyledon, with the first leaves alternate. The endogens constitute one of the grea

Aperture :: Aperture (n.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture..

Heliometry :: Heliometry (n.) The apart or practice of measuring the diameters of heavenly bodies, their relative distances, etc. See Heliometer..

Systyle :: Systyle (a.) Having a space equal to two diameters or four modules between two columns; -- said of a portico or building. See Intercolumniation.

Diameter :: Diameter (n.) The distance through the lower part of the shaft of a column, used as a standard measure for all parts of the order. See Module..

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

Slim :: Slim (superl.) Of small diameter or thickness in proportion to the height or length; slender; as, a slim person; a slim tree..

Diametral :: Diametral (n.) A diameter.

Bore :: Bore (n.) The size of a hole; the interior diameter of a tube or gun barrel; the caliber.

Saturn :: Saturn (n.) One of the planets of the solar system, next in magnitude to Jupiter, but more remote from the sun. Its diameter is seventy thousand miles, its mean distance from the sun nearly eight hundred and eighty millions of miles, and its year, or periodical revolution round the sun, nearly twenty-nine years and a half. It is surrounded by a remarkable system of rings, and has eight satellites..

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..

Mercury :: Mercury (n.) One of the planets of the solar system, being the one nearest the sun, from which its mean distance is about 36,000,000 miles. Its period is 88 days, and its diameter 3,000 miles..

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..

Chamber :: Chamber (n.) That part of the bore of a piece of ordnance which holds the charge, esp. when of different diameter from the rest of the bore; -- formerly, in guns, made smaller than the bore, but now larger, esp. in breech-loading guns..

Venus :: Venus (n.) One of the planets, the second in order from the sun, its orbit lying between that of Mercury and that of the Earth, at a mean distance from the sun of about 67,000,000 miles. Its diameter is 7,700 miles, and its sidereal period 224.7 days. As the morning star, it was called by the ancients Lucifer; as the evening star, Hesperus..

Apparent :: Apparent (a.) Appearing to the eye or mind (distinguished from, but not necessarily opposed to, true or real); seeming; as the apparent motion or diameter of the sun..

Sun :: Sun (n.) The luminous orb, the light of which constitutes day, and its absence night; the central body round which the earth and planets revolve, by which they are held in their orbits, and from which they receive light and heat. Its mean distance from the earth is about 92,500,000 miles, and its diameter about 860,000..

Rafflesia :: Rafflesia (n.) A genus of stemless, leafless plants, living parasitically upon the roots and stems of grapevines in Malaysia. The flowers have a carrionlike odor, and are very large, in one species (Rafflesia Arnoldi) having a diameter of two or three feet..

Parameter :: Parameter (n.) Specifically (Conic Sections), in the ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate..

Heliometer :: Heliometer (n.) An instrument devised originally for measuring the diameter of the sun; now employed for delicate measurements of the distance and relative direction of two stars too far apart to be easily measured in the field of view of an ordinary telescope.

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