Also tuno, toonu. [Carib name in Honduras.] A Central American tree, Castilloa Tunu, Hemsley (N.O. Artocarpaceæ), which yields a non-elastic caoutchouc called tunu gum (or tunu). (Other species produce rubber)
1883. D. Morris, Colony Brit. Honduras, 74. Next to cacao, the most interesting plant found wild in the forests of British Honduras is the indiarubber-tree, called by the natives ‘Toonu.’
1886. Sir J. D. Hooker, in Trans. Linnæan Soc., Ser. II. II. 209. Three forms or species of Castilloa … two of these are named Ule…, the third is named Tunu, and said to yield a gutta-percha.
1894. Outing (U.S.), XXIII. 354/1. On the smooth bamboo lie thick piles of tuno-bark blankets. Ibid., 356/2. Tuno gum, with which wicked huleros are wont to adulterate their rubber.
