hypermutation
Technical term in genetics and immunology referring to an unusually high rate of mutation, especially in antibody genes.
Hypermutation is an important mechanism that generates antibody diversity.
somatic hypermutation; SHM
Compound of 超 (chō, 'super-', 'hyper-') and 変異 (hen'i, 'mutation', 'variation'). The term is a direct calque of English 'hypermutation'.