The Collaborative International Dictionary of English v.0.48:

Teetee \Tee"tee\, n. [Sp. tit['i].]
   1. (Zool.) Any one of several species of small, soft-furred
      South American monkeys belonging to Callithrix,
      Chrysothrix, and allied genera; as, the collared teetee
      (Callithrix torquatus), and the squirrel teetee
      (Chrysothrix sciurea). Called also pinche, titi, and
      saimiri. See Squirrel monkey, under Squirrel.
      [1913 Webster]

   2. (Zool.) A diving petrel of Australia (Halodroma
      wrinatrix).
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Titi \Ti"ti\, n. (Zool.)
   Same as Teetee.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Titi \Ti"ti\, n. [Orig. uncert.]
   1. A tree of the southern United States (Cliftonia
      monophylla) having glossy leaves and racemes of fragrant
      white flowers succeeded by one-seeded drupes; -- called
      also black titi, buckwheat tree, and ironwood.
      [Webster 1913 Suppl.]

   2. Any related tree of the genus Cyrilla, often disting. as
      white titi.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

titi
    n 1: tree of low-lying coastal areas of southeastern United
         States having glossy leaves and racemes of fragrant white
         flowers [syn: titi, buckwheat tree, Cliftonia
         monophylla]
    2: deciduous shrubby tree of eastern North America having deeply
       fissured bark and sprays of small fragrant white flowers and
       sour-tasting leaves [syn: sorrel tree, sourwood, titi,
       Oxydendrum arboreum]
    3: small South American monkeys with long beautiful fur and long
       nonprehensile tail [syn: titi, titi monkey]