The Collaborative International Dictionary of English v.0.48:

Capuchin \Cap`u*chin"\, n. [F. capucin a monk who wears a cowl,
   fr. It. cappuccio hood. See Capoch.]
   [1913 Webster]
   1. (Eccl.) A Franciscan monk of the austere branch
      established in 1526 by Matteo di Baschi, distinguished by
      wearing the long pointed cowl or capoch of St. Francis.
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            A bare-footed and long-bearded capuchin. --Sir W.
                                                  Scott.
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   2. A garment for women, consisting of a cloak and hood,
      resembling, or supposed to resemble, that of capuchin
      monks.
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   3. (Zool.)
      (a) A long-tailed South American monkey (Cabus
          capucinus), having the forehead naked and wrinkled,
          with the hair on the crown reflexed and resembling a
          monk's cowl, the rest being of a grayish white; --
          called also capucine monkey, weeper, sajou,
          sapajou, and sai.
      (b) Other species of Cabus, as Cabus fatuellus (the
          brown capucine or horned capucine.), Cabus
          albifrons (the cararara), and Cabus apella.
      (c) A variety of the domestic pigeon having a hoodlike
          tuft of feathers on the head and sides of the neck.
          [1913 Webster]

   Capuchin nun, one of an austere order of Franciscan nuns
      which came under Capuchin rule in 1538. The order had
      recently been founded by Maria Longa.
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