WordReference Random House Unabridged Dictionary of American English © 2026
clon•i•dine
(klon′i dēn′, klō′ni-),USA pronunciation n. [Pharm.]
- Drugsa synthetic white crystalline substance, C9H9Cl2N3, used in the treatment of high blood pressure.
- c(h)lo(ro)-2 + (a)ni(line) + (imi)d(e), extracted from the chemical name + -ine2 1965–70