RhymeZone: phenoxybenzamine definitions

Definitions of phenoxybenzamine:

noun: (pharmacology) A drug that blocks the activity of alpha-receptors and is used in the form of its hydrochloride C₁₈H₂₂ClNO·HCl especially to treat hypertension and sweating due to pheochromocytoma.

(Definitions from Wiktionary)