/ Dictionary / Index A amoxicillin: Meaning and Definition of Find definitions for: am•ox•i•cil•lin Pronunciation: (am-ok"su-sil'in, u-mok"-), [key] — n. Pharm. a semisynthetic penicillin, CHNOS, taken orally as a broad-spectrum antibiotic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: amoxicillin (Thesaurus) amour-propre* Amoy Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language