Stria

Part of speech: noun (n.)

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

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