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A metal counter used in playing cards.

A large clavate spine of a fossil sea urchin.

ine fibers, of which the nucleus of a cell is in part composed; -- in opposition to kytomiton, or the network in the body of the cell. W. Flemming.

The operation of removing a cataract by thrusting a needle through the cornea of the eye, and breaking up the opaque mass.

See Curbstone.

ds and consisting of carbonyl (CO) united with two hydrocarbon radicals. In general the ketones are colorless volatile liquids having a pungent ethereal odor.

Pertaining to, or derived from, a ketone; as, a ketonic acid.

See Keynote.

The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch. Keystone State, the State of Pennsylvania; -- so called from its having been the central State of the Union at the formation of the Constitutio…

Pennsylvania; -- a nickname alluding to its having been the central one of the 13 original United States.

. An alloy of tin, copper, and mercury, sometimes used for the bearings and packings of machinery. McElrath.

A conical valve, opening outward, to close the mouth of a pipe which passes through the side of a vessel below the water line.

The black angel fish. See Angel fish, under Angel.

See Clinkstone.

A block upon which ore is broken up.

An inert gaseous element of the argon group, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152º C.; symbol, Kr; atomic weight, 83.0.

See Karyomiton.

colorless liquids, having a weak aromatic odor. They are so called because the typical lactone is derived from lactic acid.

Of, pertaining to, or derived from, lactone.

A stone for the lap, on which shoemakers beat leather.