n. The state of being striated; a striate condition or appearance; striature; also, one of a set of striæ; a stria.n. In geology, grooves, flutings, and scratches made on the surfaces of rocks by the passage over them of bodies of ice: a result frequently observed along the sides of existing glaciers, and in regions which were formerly occupied by ice.n. In mineralogy, fine parallel lines on a crystalline face, commonly due to the oscillatory combination of two crystalline forms.