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Webster 1913 Edition

Noun.

[Prob. from native name: cf. F.

ouistiti

(Zool.)

A small South American monkey; a marmoset.

[Written also

wistiti

, and

ouistiti

Noun.

The striated monkey; a small species of monkey from South America, with an annulated tail, the ouistiti of Buffon.

wistit ‎(plural wistits)

A small South American monkey; a marmoset.
- 1907, Thomas Davidson, Chambers's Twentieth Century Dictionary of the English Language, page 640:
  Ouistiti, wis′titi, n. a wistit or marmoset.