/ Dictionary / Index O osmoregulation: Meaning and Definition of Find definitions for: os•mo•reg•u•la•tion Pronunciation: (oz"mō-reg"yu-lā'shun, os"-), [key] — n. the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. osmometry osmose Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language