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otto
Otto cycle
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ottoman
Ottoman Empire
Otway Ranges
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ouabain
Ouachita
Ouachita Mountains
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ouabain

oua·ba·in [ waa báy in, waa báyn ]


noun 
Definition:
 
poisonous plant extract: a poisonous crystalline compound. Source: seeds of some African trees. Use: medicinally as a heart stimulant.

[Late 19th century. Via French oubaïo< Somali wabayo "arrow poison"]
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