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A narrow and elongated aperture; a cleft; a fissure.

A rent or long aperture; a chink; a fissure; a crack. Sir T. Browne.

Full of rimes, fissures, or chinks.

A longitudinal opening in a body, made by cutting; a cleft; a fissure. Hammond.

A fissure or crack in timber, caused by its being dried too suddenly. Gwilt.

The smooth, striated, or partially polished surfaces of a fissure or seam, supposed to have been produced by the sliding of one surface on another.

A small dislocation in beds of rock along a line of fissure. Dana.

To cut or make a long fissure in or upon; as, to slit the ear or the nose.

A crack, or longitudinl fissure.

A crack or fissure in a mast or yard, running obliquely or transversely.

A jet of steam issuing from a fissure in the earth.

A furrow; a groove; a fissure.

The act of tearing, or the state of being torn; a rent; a fissure. Macaulay. Wear and tear. See under Wear, n.

The plastic operation for closing a fissure in the hard palate.

A narrow mass of rock intersecting other rocks, and filling inclined or vertical fissures not corresponding with the stratification; a lode; a dike; -- often limited, in the language of miners, to a mineral vein or lode, that is, to a vein which contains useful minerals or ores.

body and the renal organs are also paired. The abalone (Haliotis) and the keyhole limpet (Fissurella) are examples.