The Collaborative International Dictionary of English v.0.48:

Evaginate \E*vag"i*nate\, a. [L. evaginatus, p. p., unsheathed.
   See Evagination.]
   Protruded, or grown out, as an evagination[2]; turned inside
   out; unsheathed; evaginated; as, an evaginate membrane.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Evaginate \E*vag"i*nate\, v. i. & t. [imp. & p. p. Evaginated;
   p. pr. & vb. n. Evaginating.]
   To become evaginate; to cause to be evaginate.
   [Webster 1913 Suppl.]