From Ancient Greek ὁρμή (hormḗ, “rapid motion forwards, onrush, onset, assault, impulse to do a thing, effort”), from ὁρμάω (hormáō), ὁρμῶ (hormô, “to set in motion, to urge on, to cheer on, to make a start, to hasten on”).
hormone (plural hormones)
- (physiology) Any substance produced by one tissue and conveyed by the bloodstream to another to effect physiological activity.
- (pharmacology) A synthetic compound with the same activity.
- Any similar substance in plants.
- See also Thesaurus:hormone