/ Dictionary / Index E effective current: Meaning and Definition of Find definitions for: effec'tive cur'rent Pronunciation: [key] — Elect. Elect. the magnitude of an alternating current having the same heating effect as that of a given magnitude of direct current. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. effective effective dose Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language