(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.

(transitive, colloquial) To treat with hormones.

(usually with on, upon, etc.) The back of a horse. / A ridge of sand, gravel, and boulders.

On the back of a horse.

A tree of the genus Carpinus, having a smooth gray bark and a ridged trunk, the wood being white and very hard, common along the banks of streams in the United States.

A wandering troop or gang; especially, a clan or tribe of a nomadic people (originally Tatars) migrating from place to place for the sake of pasturage, plunder, etc.; a predatory multitude.

to travel en masse, to flock

Alectis indica (Indian threadfish) / Atule (certain scads) / Caranx spp. (certain trevallies) / Carangoides spp. (island jacks) / Gnathanodon speciosus (golden trevally)

(idiomatic, euphemistic) Sexual intercourse.

A large wasp, of the genus Vespa, having a brown-and-yellow-striped body and the ability to inflict a serious sting. / A person who pesters with petty but ceaseless attacks.