root beer

Từ điển Oxford Advanced Learner 8th

ˈroot beer [root beer root beers] BrE NAmE noun
1. uncountable a sweet ↑fizzy drink (= with bubbles), that does not contain alcohol, made from ↑ginger and the roots of other plants. It is drunk especially in the US.
2. countable a bottle, can or glass of root beer
•Two root beers.