oka
noun
less common spelling of oca
: a South American wood sorrel (Oxalis tuberosa) cultivated for its edible tubers
also
: the tuber of an oca
Cite this Entry
“Oka.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oka. Accessed 4 Nov. 2025.
Copy CitationGeographical Definition
Oka
geographical name
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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