/ Dictionary / Index E electrotonus: Meaning and Definition of Find definitions for: e•lec•trot•o•nus Pronunciation: (i-lek-trot'n-us, ē"lek-), [key] — n. Physiol. the altered state of a nerve during the passage of an electric current through it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. electrotin electrotype Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language