WordReference Random House Unabridged Dictionary of American English © 2026
plac•ode
(plak′ōd),USA pronunciation n. [Embryol.]
- Developmental Biologya local thickening of the endoderm in the embryo, that usually constitutes the primordium of a specific structure or organ.
- Greek plak- (stem of pláx) something flat, tablet + -ode1
- 1905–10
'placode' also found in these entries (note: many are not synonyms or translations):