upas

noun

1. the poisonous milky sap of a large tree, Antiaris toxicaria, of the mulberry family, native to tropical Asia, Africa, and the Philippine Islands, used for arrow poison.
2. the tree itself.

noun

1. a large moraceous tree of Java, Antiaria toxicaria, having whitish bark and poisonous milky sap
2. the sap of this tree, used as an arrow poison

n.legendary poisonous tree of Java, 1783, from Malay upas “poison,” in pohun upas “poison tree.” The story appears to have originated in Dutch in 1770s.