Definition of suprasterol in US English:

suprasterol

noun

Biochemistry
  • Either of two isomeric polycyclic compounds ("suprasterol I", "suprasterol II"), produced by prolonged ultraviolet irradiation of calciferol (vitamin D₂).

Origin

1930s; earliest use found in British Chemical Abstracts. From supra- + -sterol, after German Suprasterin; so called on account of the deliberately prolonged irradiation used to prepare the compounds.