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Biology A minute projection arising from a mucous membrane, especially:
(noun)
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Biology One of the numerous vascular projections of the small intestine.
(noun)
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Biology One of the fingerlike projections of the chorion that contribute to the formation of the placenta in mammals.
(noun)
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Botany A fine, hairlike epidermal outgrowth.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.