Source : Webster's Revised Unabridged Dictionary (1913)

Evagination \E*vag`i*na"tion\, n.
   An outgrowth or protruded part.

Evagination \E*vag`i*na"tion\, n. [L. evaginatio an extending,
   evaginare to unsheathe; e out + vagina sheath.]
   The act of unsheathing.