/ Dictionary / Index C clonic spasm: Meaning and Definition of Find definitions for: clon'ic spasm' Pronunciation: [key] — Med. Med. See under(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clonic clonidine Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language