The Collaborative International Dictionary of English v.0.48:

Divi-divi \Di"vi-di"vi\, n. [Native name.] (Bot.)
   A small tree of tropical America (C[ae]salpinia coriaria),
   whose legumes contain a large proportion of tannic and gallic
   acid, and are used by tanners and dyers.
   [1913 Webster]

WordNet (r) 3.0 (2006):

divi-divi
    n 1: twisted seed pods of the divi-divi tree; source of tannin
    2: small thornless tree or shrub of tropical America whose seed
       pods are a source of tannin [syn: divi-divi, Caesalpinia
       coriaria]