on·ion 
/ˈʌnjən/ noun
plural on·ions /ˈʌnjən/ noun : a round vegetable that is usually white, yellow, or red and has a strong smell and taste [count] ▪ The recipe calls for chopped onions. ▪ He is growing onions in the garden this year. [noncount] ▪ The recipe calls for chopped onion. — see color picture; see also green onion
