WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. (botany) a plant product that acts like a hormone
Word Usage
"Mapping and genetic complementation tests indicate that sum63 is allelic to CYP85A2 (AT3G30180) a cytochrome p450 enzyme that catalyzes the final steps in the synthesis of the phytohormone brassinolide."