Source : Webster's Revised Unabridged Dictionary (1913)

Endogeny \En*dog"e*ny\, n. [See {Endogenesis}.] (Biol.)
   Growth from within; multiplication of cells by endogenous
   division, as in the development of one or more cells in the
   interior of a parent cell.

Source : WordNet®

endogeny
     n : a geological phenomenon below the surface of the earth