Source : Webster's Revised Unabridged Dictionary (1913)

Histogenesis \His`to*gen"e*sis\, n. [Gr. "isto`s tissue + E.
   genesis.] (Biol.)
   (a) The formation and development of organic tissues;
       histogeny; -- the opposite of histolysis.
   (b) Germ history of cells, and of the tissues composed of
       cells. --Haeckel.