Ypsiliform

1 definition found

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

  Ypsiliform \Yp*sil"i*form\, a. [Gr. ? ? the name of the letter ?
     + -form.] (Biol.)
     Resembling the ? in appearance; -- said of the germinal spot
     in the ripe egg at one of the stages of fecundation.
     [1913 Webster]