prechordal


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prechordal

 [pre-kor´d'l]
in front of the notochord.

pre·chor·dal

(prē-kōr'dăl),
Located cephalic to the notochord.
Synonym(s): prochordal

prechordal

/pre·chor·dal/ (-kord´'l) situated cranial to the notochord.

prechordal

situated in front of the notochord in the developing embryo.
References in periodicals archive ?
During third week of development, pre-notochordal cells invaginating inside the primitive pit move forward and cephalad upto prechordal plate.
The middle of this region gets turned off, or suppressed, from eye formation," says Rao, noting that when the prechordal mesoderm is removed from a developing chick or frog embryo, a single eye forms.
For instance, in vertebrates the formation of epidermal or neural ectoderm depends upon the presence of the prechordal and chordal mesoderm (Nieuwkoop 1952).