invagination
Americannoun
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the act or process of invaginating.
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Embryology. the inward movement of a portion of the wall of a blastula in the formation of a gastrula.
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Pathology. intussusception.
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a form or shape resulting from an infolded tissue.
noun
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pathol the process of invaginating or the condition of being invaginated; intussusception
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pathol an invaginated organ or part
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an infolding of the outer layer of cells of an organism or part of an organism so as to form a pocket in the surface, as in the embryonic development of a gastrula from a blastula
Etymology
Origin of invagination
First recorded in 1650–60; invaginate + -ion
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The archenteron develops into the alimentary canal, and a mouth opening is formed by invagination of ectoderm at the pole opposite the blastopore of the gastrula.
From Textbooks • Jan. 1, 2015
White arrow denotes the invagination that forms the shell gland.
From Nature • Oct. 3, 2012
White arrow denotes the invagination that forms the shell gland.
From Nature • Oct. 3, 2012
The preconchylian invagination or shell-gland is formed in the embryo behind the velum, on the surface opposite the blastopore.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various
No sign of a cloacal invagination could be made out with certainty.
From Development of the Digestive Canal of the American Alligator by Reese, C. M.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
