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up-bow
up-front
up quark
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Upanayana
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upas

u·pas [ ypəss ] (plural u·pas·es or u·pas)


noun 
Definition:
 
1. tropical tree: a tree with white bark and poisonous sap. Native to: Southeast Asia.  Latin name Antiaria toxicaria.

2. poison from upas tree: a poison made from the sap of the upas. Use: tipping arrows.

[Late 18th century. < Malay (pohun) upas "poison (tree)"]
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