chalazogamic

1 definition found

chalazogamic - Collaborative International Dictionary of English v.0.48 :

  Chalazogamy \Chal`a*zog"a*my\, n. [Chalaza + -gamy, as in
     polygamy.] (Bot.)
     A process of fecundation in which the pollen tube penetrates
     to the embryosac through the tissue of the chalaza, instead
     of entering through the micropyle. It was originally
     discovered by Treub in Casuarina, and has since been found
     to occur regularly in the families Betulace[ae] and
     Juglandace[ae]. Partial chalazogamy is found in Ulmus,
     the tube here penetrating the nucleus midway between the
     chalaza and micropyle. -- Chal`a*zo*gam"ic, a.
     [Webster 1913 Suppl.]