Also called rime ice.an opaque coating of tiny, white, granular ice particles, caused by the rapid freezing of supercooled water droplets on impact with an object. Compare frost( def 2 ), glaze( def 17 ).
"hoarfrost," O.E. hrim, from P.Gmc. *khrima- (cf. O.N. hrim, Du. rijm, Ger. Reif). O.Fr. rime is of Gmc. origin. Rare in M.E., surviving mainly in Scottish and northern Eng., revived in literary use late 18c.