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placode

[plak-ohd]
noun Embryology.
  1. a local thickening of the endoderm in the embryo, that usually constitutes the primordium of a specific structure or organ.
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Origin of placode

1905–10; < Greek plak- (stem of pláx) something flat, tablet + -ode1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

placode in Medicine

placode

(plăkōd′)
n.
  1. An area of thickening in the embryonic epithelial layer from which some organ or structure later develops.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.