1. 黄瓜
A cucumber is a long thin vegetable with a hard green skin and wet transparent flesh. It is eaten raw in salads.

2. (尤指意料之外地)非常冷静，泰然自若
If you say that someone is as cool as a cucumber, you are emphasizing that they are very calm and relaxed, especially when you would not expect them to be.

1. cylindrical green fruit with thin green rind and white flesh eaten as a vegetable
related to melons

Synonym: cuke

2. a melon vine of the genus Cucumis
cultivated from earliest times for its cylindrical green fruit

Synonym: cucumber vineCucumis sativus