WordReference Random House Unabridged Dictionary of American English © 2026
mez•lo•cil•lin
(mez′lə sil′in),USA pronunciation n. [Pharm.]
- Drugsa wide-spectrum semisynthetic penicillin, C21H25N5O8S2, used parenterally in the treatment of infections due to Pseudomonas aeruginosa.
- me(thyl) + (imida)zol(e) (rearranged), components of the chemical name + (peni)cillin