Source : Webster's Revised Unabridged Dictionary (1913)

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.