[ ŏp′tə-məm ]
The quantity of a radiological or pharmacological substance that will produce the desired effect without any unfavorable effects.
Words That Can Ruin Your SentenceActually . . . crutch words slip into sentences in order to give the speaker more time to think or to emphasize a statement. Over time, they become unconscious verbal tics. Here are some crutch words to avoid!
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.