Noun
the use of extreme cold (usually liquid nitrogen) to destroy unwanted tissue (warts or cataracts or skin cancers)
Source: WordNet; Cryosurgery : The branch of surgery applying very low temperatures (down to −196 °C) to destroy malignant tissue, e.g. cancer cells. Source: Internet
Medical use Cryosurgery procedures such as cryoablation use liquid argon to destroy tissue such as cancer cells. Source: Internet