/ Dictionary / Index R releasing mechanism: Meaning and Definition of Find definitions for: releas'ing mech"anism Pronunciation: [key] — Ethology. Ethology. a hypothetical control complex in the central nervous system of animals that triggers the appropriate behavioral response to a releaser. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. releasing factor relegate Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language