Breadcrumb Home > Dictionary > Index E effective dose: Meaning and Definition of Find definitions for: effec'tive dose' Pronunciation: [key] the amount of a drug, or level of radiation exposure, that is sufficient to achieve the desired clinical improvement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. effective current effective resistance TrendingHere are the facts and trivia that people are buzzing about. Ramadan and Eid al-Fitr 42 Best War Movie Quotes Current Events This Week: March 2023 Recycling Facts William Shakespeare Worst U.S. Forest Fires ✖ Related Content Daily Word Quiz: nonplus Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language