"plant hormone." YourDictionary, n.d. Web. 10 November 2018. <https://www.yourdictionary.com/plant-hormone>.
plant hormone. (n.d.). Retrieved November 10th, 2018, from https://www.yourdictionary.com/plant-hormone
Any of various hormones produced by plants that control or regulate germination, growth, metabolism, or other physiological activities. Auxins, cytokinins, gibberellins, and abscisic acid are examples of plant hormones. Also called phytohormone