cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins | large edible rays having a long snout and thick tail with pectoral fins continuous with the head; swim by undulating the edges of the pectoral fins |
any of the stiff bony spines in the fin of a fish | sports equipment that is worn on the feet to enable the wearer to glide along and to be propelled by the alternate actions of the legs |
the syllable naming the second (supertonic) note of any major scale in solmization | |
a column of light (as from a beacon) | |
a group of nearly parallel lines of electromagnetic radiation | |
a branch of an umbel or an umbelliform inflorescence | |
(mathematics) a straight line extending from a point | |