noun. a liquid that boils at below -160 C and is used as a refrigerant.
- liquid air
- -gen (English)
- -γενής (Ancient Greek (to 1453))
- cryo- (English)
- κρύος (Ancient Greek (to 1453))
Example sentences of the word cryogen
1. Noun, singular or mass
A cryogen -- a spray device containing carbon dioxide, liquid nitrogen and argon -- is the main tool used in cryotherapy, which freezes and kills abnormal cells.