imaginal disk

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i·ma·gi·nal disk

(ĭ-măj′ə-nəl, -mā′jə-, -mä′gə-)
Any of several groups of cells in a larva that give rise to certain organs and structures of the adult organism, found in insects that undergo complete metamorphosis.
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.
References in periodicals archive ?
Gehring's group added to fruit flies copies of the vertebrate genes that had been engineered to become active in imaginal disks, embryonic tissues that give rise to adult insect structures like wings and legs.
Just before an insect larva changes into a flying adult, it develops white globs of cells called imaginal disks that later become its wings, explains Sean B.