quinoa Syllabification: (qui·noa)Pronunciation: /ˈkēnwä/Definition of quinoa noun a goosefoot found in the Andes, where it was widely cultivated for its edible starchy seeds before the introduction of Old World grains. Chenopodium quinoa, family Chenopodiaceae the grainlike seeds of the quinoa, used as food and in the production of alcoholic drinks. Origin: early 17th century: Spanish spelling of Quechua kinua, kinoaquinoa in other Oxford dictionaries Definition of quinoa in the British & World English dictionary