The Collaborative International Dictionary of English v.0.48:

Evanid \E*van"id\, a. [L. evanidus, fr. evanescere. See
   Evanesce.]
   Liable to vanish or disappear; faint; weak; evanescent; as,
   evanid color. [Obs.]
   [1913 Webster]

         They are very transitory and evanid.     --Barrow.
   [1913 Webster]