Source : Webster's Revised Unabridged Dictionary (1913)

Essentiate \Es*sen"ti*ate\, v. t. [imp. & p. p. {Essentiated};
   p. pr. & vb. n. {Essentiating}.]
   To form or constitute the essence or being of. [Obs.]
   --Boyle.

Essentiate \Es*sen"ti*ate\, v. i.
   To become assimilated; to be changed into the essence. [Obs.]
   --B. Jonson.