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A marine mollusk of the genus Dentalium, with a curved conical shell resembling a tooth. See Dentalium.

A genus of marine mollusks belonging to the Scaphopoda, having a tubular conical shell.

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.

A straight line so situated with respect to a conic section that the distance of any point of the curve from it has a constant ratio to the distance of the same point from the focus.

A hardened steel plate having a hole, or a gradation of conical holes, through which wires are drawn to be reduced and elongated.

diameter of the ellipse is the major axis, and the least diameter is the minor axis. See Conic section, under Conic, and cf. Focus.

United into a conical bundle, or into a bundle with an enlarged head, like a sheaf of wheat.

A genus of marine gastropod mollusks, having a conical or limpetlike shell, with an opening at the apex; -- called also keyhole limpet.

A point so related to a conic section and certain straight line called the directrix that the ratio of the distace between any point of the curve and the focus to the distance of the same point from the directrix is constant.

n the other shaft, compels the shafts to rotate together, by the hold the friction of the conical surfaces gives. (b) A toothed clutch, one member of which, instead of being made fast on its shaft, is held by friction and can turn, by slipping, under excessive strain or in starting. -- Friction drop hammer, one in whi…

A genus of birds, with a short, conical, pointed bill. It formerly included all the sparrows and finches, but is now restricted to certain European finches, like the chaffinch and brambling.

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…

An organ stop with conical tin pipes.

A kind of apple, of a roundish conical shape, purplish red color, and having a large core. [Written also gilliflower.] Clove gillflower, the clove pink. -- Marsh gillyflower, the ragged robin (Lychnis Flos-cuculi). -- Queen's, or Winter, gillyflower, damewort. -- Sea gillyflower, the thrift (Armeria vulgaris). -- W…

Glyconic.

A conical chamber at the breech of the bore in heavy ordnance, especially in mortars; -- named after the inventor.

A conical pile or hear of hay in the field. The tanned haycock in the mead. Milton.

A stack or conical pile of hay in the open air.

s Greek physician and medical writer, born in Cos, about 460 B. C. Hippocrates' sleeve, a conical strainer, made by stitching together two adjacent sides of a square piece of cloth, esp. flannel of linen.

A fossil bivalve mollusk of the genus Hippurites, of many species, having a conical, cup-shaped under valve, with a flattish upper valve or lid. Hippurites are found only in the Cretaceous rocks.