| Full | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Term | Definition |
|---|---|
| vacuole | A fluid-filled sac within a cell. |
| vaporization | The evaporation of the active ingredient in a pesticide during or after application. |
| variegation | An inherited, irregular pattern of color on a leaf or petal. |
| variety | A strain of a plant having distinctive features that persist over successive generations in the absence of human intervention. Generally, variety applies to naturally occurring strains, while cultivar applies to horticulturally developed strains. |
| vascular cambium | A narrow cylinder of cells that gives rise to secondary xylem and phloem. A lateral meristem. |
| vascular plant | A plant which has water and food conducting tissues. |
| vascular tissue | Water-, nutrient-, and photosynthate-conducting tissue. See xylem, phloem. |
| vector | A transmitter or carrier of disease. |
| vegetative propagation | The increase of plants by asexual means using vegetative parts. Normally results in a population of identical individuals. Can occur by either natural means (e.g., bulblets, cormels, offsets, plantlets, or runners), or by artificial means (e.g., cuttings, division, budding, grafting, or layering). |
| vein | A strand of xylem and phloem in a leaf blade. |
| venation | The arrangement of veins in a leaf. |
| vernalization | A low-temperature treatment promoting flowering. |
| vernation | The arrangement of new leaves within an older leaf sheath (e.g., on a grass plant). |
| vertical spacing | The vertical space between branches on a tree. |
| viability | A seed’s ability to germinate. |
| virus | An infectious agent too small to see with a compound microscope. Multiplies only within a living host cell. |