Any of numerous organic compounds produced by plants which regulate growth and other physiological activities; (also) any synthetic compound…

a substance that is produced in a plant in response to a wound and stimulates healing; cf. traumatic acid at traumatic, adj. 3.

= hormone, n. 2.

A hormone produced by a plant; = hormone, n. 2.

An organic substance which promotes and directs the growth of plant cells; a growth hormone.

A growth-promoting hormone, (C8H6N)CH2·COOH, that occurs in some plants and micro-organisms; also called β-indolyl acetic acid, 3-indoleacetic acid.

An unidentified hormone supposed to induce flowering in plants.

Botany. traumatic acid, a plant hormone that is found in damaged tissue in some plants and promotes its repair; dodec-2-ene-1,12-dioic acid…

Either of two substances that promote leaf abscission, (a) (more fully abscisin I) one isolated from cotton bolls (now historical); (b) (more fully…

A plant hormone (a cytokinin) first isolated from maize kernels and found in a variety of other plants; (also) an isomer or derivative of this.

Any of a large group of natural and synthetic purine derivatives that function as growth regulators in plants, acting to promote cell division…

A steroid hormone produced by female hyphae of the filamentous fungus Achlya bisexualis, which stimulates the male hyphae to produce antheridia.

a plant hormone which promotes seed and bud dormancy and inhibits germination.

A steroid hormone produced by male hyphae of several filamentous fungi of the genus Achlya, which stimulates female hyphae to produce oogonia. Cf. a…