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1. One that releases: a releaser of shipments.
2. A stimulus that releases a specific behavior pattern in an animal.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. a person or thing that releases.
2. a sign or stimulus, as a patch of color or a sound, that initiates a stereotyped behavioral response in an animal.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.