a sustained phenomenon or one marked by gradual changes through a series of states | cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins |
a particular course of action intended to achieve a result | any of the stiff bony spines in the fin of a fish |
a natural prolongation or projection from a part of an organism either animal or plant | the syllable naming the second (supertonic) note of any major scale in solmization |
(psychology) the performance of some composite cognitive activity; an operation that affects mental contents | a column of light (as from a beacon) |
a mental process that you are not directly aware of | a group of nearly parallel lines of electromagnetic radiation |
a writ issued by authority of law; usually compels the defendant's attendance in a civil suit; failure to appear results in a default judgment against the defendant | a branch of an umbel or an umbelliform inflorescence |
| (mathematics) a straight line extending from a point |