oka
nounless common spelling of oca
: either of two South American wood sorrels (Oxalis crenata and O. tuberosa) cultivated for their edible tubers also : the tuber of an oca
Oka
geographical name
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Definition of Oka (Entry 2 of 2)
1 river 530 miles (853 kilometers) long in south central Russia in Asia flowing north from the Sayan Mountains into the Angara River
2 river 919 miles (1479 kilometers) long in central Russia in Europe flowing into the Volga River
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