WordReference Random House Unabridged Dictionary of American English © 2026
gua•na•drel
(gwä′nə drel′, -drəl),USA pronunciation n. [Pharm.]
- Drugsa substance, C20H40N6O8S, used as an antihypertensive.
- perh. guan(idine) + adre(energic) + -l, of uncertain derivation