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
streaks of glass of different optical quality caught in the dome of a paperweight Striae can give the glass a sugary or grainy appearance which is undesirable