Meaning of releaser

re•leas•er

Pronunciation: (ri-lē'sur), [key]
— n.
  1. a person or thing that releases.
  2. a key stimulus, as a sound, odor, moving shape, or patch of color, that elicits a predictable behavioral response in an animal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.