placode
[plak´ōd] a platelike structure, especially a thickening of the ectoderm marking the site of future development in the early embryo of an organ of special sense, e.g., the auditory placode (ear), lens placode (eye), and olfactory placode (nose).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
plac·ode
(plak'ōd), Local thickening in the embryonic ectodermal layer; the cells of the placode ordinarily constitute a primordial group from which a sense organ or ganglion develops.
[G. plakōdēs, fr. plax, anything flat or broad, + eidos, like]
Farlex Partner Medical Dictionary © Farlex 2012
plac·ode
(plak'ōd) Local thickening in the embryonic ectodermal layer; the cells of the placode ordinarily constitute a primordial group from which a sense organ or ganglion develops.
[G. plakōdēs, fr. plax, anything flat or broad, + eidos, like]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
placode
a plate-like embryonic structure from which a particular organ, such as the eye, develops.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005