/ Dictionary / Index C clonus: Meaning and Definition of Find definitions for: clo•nus Pronunciation: (klō'nus), [key] — pl. -nus•es. a rapid succession of flexions and extensions of a group of muscles, usually signifying an affection of the brain or spinal cord. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: clonus (Thesaurus) clonk cloot Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language