Ectental

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ectental \Ec*ten"tal\, a. [Gr. 'ekto`s outside + ? inside.]
     (Biol.)
     Relating to, or connected with, the two primitive germ
     layers, the ectoderm and ectoderm; as, the "ectental line" or
     line of juncture of the two layers in the segmentation of the
     ovum. --C. S. Minot.


     [1913 Webster]