(genetics) a virus or other agent that is used to deliver DNA to a cell | cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins |
a variable quantity that can be resolved into components | any of the stiff bony spines in the fin of a fish |
any agent (person or animal or microorganism) that carries and transmits a disease | the syllable naming the second (supertonic) note of any major scale in solmization |
a straight line segment whose length is magnitude and whose orientation in space is direction | 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 |