2. a branch of an umbel or an umbelliform inflorescence
3. (mathematics) a straight line extending from a point
4. a group of nearly parallel lines of electromagnetic radiation
5. the syllable naming the second (supertonic) note of any major scale in solmization
6. any of the stiff bony rods in the fin of a fish
7. cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins