upas
(noun)
noun
1. (usually countable, botany) A tree Antiaris toxicaria of the mulberry family, common in the forests of Java and the neighboring islands, with poisonous secretions.
2. (uncountable) A virulent poison used in Java and the adjacent islands for poisoning arrows derived from the tree.
3. (uncountable) A poison prepared from a climbing plant Strychnos tieute