Akademik

(botany) a plant product that acts like a hormone

1. : a plant regulator (as indoleacetic acid or ethylene) produced by plants that usually moves within the plant from the site of production to the site of action — called also phytohormone

2. : a synthetic plant regulator

plant hormone,

any one of a group of substances that affect the growth of plants, including auxins, gibberellins, cytokinins, abscisic acid, and ethylene.