Definition of subfractionation in US English:

subfractionation

noun

Biochemistry Chemistry
  • The action or process of separating a fraction into further fractions by fractionation.

Origin

1920s; earliest use found in Proceedings of the Royal Society of London. From sub- + fractionation, after subfraction.

Pronunciation

subfractionation

/ˌsʌbfrakʃəˈneɪʃn/