The Collaborative International Dictionary of English v.0.48:

Mezzotinto \Mez`zo*tin"to\, n. [It. mezzo half + tinto tinted,
   p. p. of tingere to dye, color, tinge, L. tingere. See
   Mezzo.]
   Mezzotint.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mezzotinto \Mez`zo*tin"to\, v. t. [imp. & p. p. Mezzotintoed;
   p. pr. & vb. n. Mezzotintoing.]
   To engrave in mezzotint; to represent by mezzotint.
   [1913 Webster]