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

Howitzer :: Howitzer (n.) A short, light, largebore cannon, usually having a chamber of smaller diameter than the rest of the bore, and intended to throw large projectiles with comparatively small charges..

Cone Pulley :: Cone pulley () A pulley for driving machines, etc., having two or more parts or steps of different diameters; a pulley having a conical shape..

Micrometer :: Micrometer (n.) An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass..

Fusee :: Fusee (n.) The cone or conical wheel of a watch or clock, designed to equalize the power of the mainspring by having the chain from the barrel which contains the spring wind in a spiral groove on the surface of the cone in such a manner that the diameter of the cone at the point where the chain acts may correspond with the degree of tension of the spring..

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

Calipers :: Calipers (n. pl.) An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses..

Equirotal :: Equirotal (a.) Having wheels of the same size or diameter; having equal rotation.

Diameter :: Diameter (n.) Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve..

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..

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

Breadfruit :: Breadfruit (n.) The fruit of a tree (Artocarpus incisa) found in the islands of the Pacific, esp. the South Sea islands. It is of a roundish form, from four to six or seven inches in diameter, and, when baked, somewhat resembles bread, and is eaten as food, whence the name..

Over :: Over (adv.) From one side to another; from side to side; across; crosswise; as, a board, or a tree, a foot over, i. e., a foot in diameter..

Opposite :: Opposite (a.) Set over against each other, but separated by the whole diameter of the stem, as two leaves at the same node..

Tower :: Tower (n.) A mass of building standing alone and insulated, usually higher than its diameter, but when of great size not always of that proportion..

Diametrical :: Diametrical (a.) Of or pertaining to a diameter.

Biparietal :: Biparietal (a.) Of or pertaining to the diameter of the cranium, from one parietal fossa to the other..

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..

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..

Semidiameter :: Semidiameter (n.) Half of a diameter; a right line, or the length of a right line, drawn from the center of a circle, a sphere, or other curved figure, to its circumference or periphery; a radius..

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