cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins | extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned |
any of the stiff bony spines in the fin of a fish | bottom-living cephalopod having a soft oval body with eight long tentacles |
the syllable naming the second (supertonic) note of any major scale in solmization | medium-sized greyish-black whale of the northern Pacific |
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 | |