Merriam-Webster Collegiate Dictionary - titi

 I. noun  Etymology: origin unknown  Date: 1827  1. a tree (Cliftonia monophylla of the family Cyrillaceae) of the southeastern United States with leathery leaves and racemes of fragrant white flowers  2. leatherwood 2  II. noun  Etymology: American Spanish titi  Date: 1832 any of a genus (Callicebus) of small South American monkeys having long thick variably colored fur and a tail that is not prehensile