a group of nearly parallel lines of electromagnetic radiation [同] electron beam , beam , ray
the syllable naming the second (supertonic) note of any major scale in solmization [同] ray , re
any of the stiff bony rods in the fin of a fish
cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins