[oca] n [Sp, fr. Quechua oqa] (1604): either of two So. American wood sorrels (Oxalis crenata and O. tuberosa) cultivated for their edible tubers; also: the tuber of an oca
OCA
Meaning of OCA in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012