variant 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
Definition of Oka
1 river 530 miles (853 kilometers) S cen Russia in Asia flowing N from the Sayan Mountains into the Angara
2 river 919 miles (1479 kilometers) cen Russia in Europe flowing into the Volga
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