Meaning of micromutation in English:

micromutation

Pronunciation /ˌmʌɪkrə(ʊ)ˌmjuːˈteɪʃn/

noun

Biology
  • Originally: mutation that has a small or inapparent effect on the phenotype; an instance of this. In later use also: a point mutation.

Origin

1940s. From micro- + mutation.