n. A concrete juice, or gum resin, produced by several species of trees in Siam, Ceylon, and Malabar. It is brought in masses, or cylindrical rolls, from Cambodia, or Cambogia, -- whence its name. The best kind is of a dense, compact texture, and of a beatiful reddish yellow. Taken internally, it is a strong and harsh cathartic and emetic. [ Written also camboge. ] [ 1913 Webster ]

☞ There are several kinds of gamboge, but all are derived from species of Garcinia, a genus of trees of the order Guttiferæ. The best Siam gamboge is thought to come from Garcinia Hanburii. Ceylon gamboge is from G. Morella. G. pictoria, of Western India, yields gamboge, and also a kind of oil called gamboge butter.