Definition of upas in English:

upas

Syllabification: u·pas
Pronunciation: /ˈyo͞opəs
 
/
(also upas tree)

noun

1A tropical Asian tree, the milky sap of which has been used as arrow poison and for ritual purposes.
  • Antiaris toxicaria, family Moraceae
1.1(In folklore) a Javanese tree alleged to poison its surroundings and said to be fatal to approach.

Origin

late 18th century: from Malay (pohun) upas 'poison (tree)'.

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