Dictionary.net

A minute groove, or channel; a threadlike line, as of color; a narrow structural band or line; a striation; as, the striae, or groovings, produced on a rock by a glacier passing over it; the striae on the surface of a shell; a stria of nervous matter in the brain.

A fillet between the flutes of columns, pilasters, or the like.

A stripe, band, or line, distinguished by color, texture, depression, or elevation from the tissue in which it is found.

A grooved line.

L. for Streak.

Gen. and pl. striae. A fine line (e. g., a ridge, or streak of color; especially one of a number of such lines when they are parallel).

n. [Latin] A small channel or thread-like line in the surface of a shell, a crystal, or other object ; -a fillet between the flutes of columns or pilasters ; -a large purple spot appearing under the skin in some malignant fevers.