Source : Webster's Revised Unabridged Dictionary (1913)

Enation \E*na"tion\, n. (Bot.)
   Any unusual outgrowth from the surface of a thing, as of a
   petal; also, the capacity or act of producing such an
   outgrowth.

Source : WordNet®

enation
     n 1: line of descent traced through the maternal side of the
          family [syn: {matrilineage}, {cognation}]
     2: a natural projection or outgrowth from a plant body or organ
        [syn: {plant process}]