placode

plac·ode

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

Origin:
1905–10; < Greek plak- (stem of pláx) something flat, tablet + -ode1

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American Heritage
Medical Dictionary

placode plac·ode (plāk'ōd')
n.
An area of thickening in the embryonic epithelial layer from which some organ or structure later develops.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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00:10
Placode is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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