/ Dictionary / Index C capsid: Meaning and Definition of Find definitions for: cap•sid Pronunciation: (kap'sid), [key] — n. the coiled or polyhedral structure, composed of proteins, that encloses the nucleic acid of a virus. Also called cap•sid Pronunciation: (kap'sid), [key] — n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: capsid (Thesaurus) capsicum capsize Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language