Infobox Embryology
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The Lens placode is a thickened portion of ectoderm which serves as the precursor to the lens.
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lens placode — n an ectodermal placode from which the lens of the embryonic eye develops * * * a thickened area of ectoderm directly overlying the optic vesicle in the early embryo, from which the lens develops … Medical dictionary
lens placode — noun : an ectodermal placode from which the lens of the embryonic eye develops … Useful english dictionary
Lens (anatomy) — Crystalline lens (anatomy) Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens … Wikipedia
Placode — A placode is an area of thickening in the embryonic epithelial layer where some organ or structure later develops. The term usually refers to cranial placodes, peripheral nervous system structures associated with the special senses and cranial… … Wikipedia
placode — Local thickening in the embryonic ectoderm layer; the cells of the p. ordinarily constitute a primordial group from which a sense organ or ganglion develops. [G. plakodes, fr. plax, anything flat or broad, + eidos, like] auditory placodes SYN:… … Medical dictionary
placode — ˈplaˌkōd noun ( s) Etymology: International Scientific Vocabulary plac + ode : a platelike thickening of embryonic ectoderm from which a definitive structure develops ear placode olfactory placode see lens placode … Useful english dictionary
lens pit — a pitlike depression in the ectoderm of the lens placode where the primordial lens is developing … Medical dictionary
lens rudiment — see under placode … Medical dictionary
Otic placode — Latin placoda otica Code TE E5.15.2.0.0.0.4 In embryology, the otic placode is a thickening of the ectoderm on the outer surface of a developing embryo from which the ear develops. The ear, including both the vestibular system and the auditory… … Wikipedia
optic placode — noun : lens placode … Useful english dictionary
