- a tall Javanese tree (Antiaris toxicaria) of the mulberry family, whose whitish bark yields a poisonous, milky juice used as an arrow poison
- the juice of this tree
- something harmful or deadly in its influence
Origin: short for Malay pohon upas, literally , poison tree (from Javanese upas, plant poison)
Used by arrangement with John Wiley & Sons, Inc.
- A deciduous tree (Antiaris toxicaria) of tropical Africa and Asia that yields a latex used as an arrow poison.
- The poison obtained from this tree or from similar trees.
Origin: Malay (pohun) upas, poison (tree), of Javanese origin.