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Either of a pair of endocrine glands located in the prothorax of certain insects and secreting a hormone that regulates molting.
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.
either of a pair of endocrine glands in the thorax of some insects, functioning to promote molting.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.