[plak-ohd] /ˈplæk oʊd/

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

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


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