Source : Webster's Revised Unabridged Dictionary (1913)

Tenuate \Ten"u*ate\, v. t. [imp. & p. p. {Tenuated}; p. pr. &
   vb. n. {Tenuating}.] [L. tenuatus, p. p. of tenuare to make
   thin, fr. tenuis thin. See {Tenuous}.]
   To make thin; to attenuate. [R.]