Archaeostomatous

1 definition found

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

  Archaeostomatous \Ar`ch[ae]*o*stom"a*tous\, a. [Gr. 'archai^os
     ancient + sto`ma mouth.] (Biol.)
     Applied to a gastrula when the blastopore does not entirely
     close up.
     [1913 Webster] archaeozoic