CEDICT
Wiktionary
植物名。芸香科柑橘属，常绿灌木。产于热带，果实椭圆，成熟后色黄、味酸，可作饮料，也可供药用，皮可製油。
重編國語辭典
維基詞典
Lemon is sour.
Source: Tatoeba
Lemons are sour.
These lemons are fresh.
The lemon is yellow.
The lemon has a flavor all of its own.