One of the mysteries of the English language finally explained.
In full "gamma-butyrolactone". An oily liquid γ-lactone used as a solvent and sometimes also taken as a recreational drug (being metabolized to GHB in the body).
Late 19th century; earliest use found in Science. From butyro- + lactone, after German Butyrolakton.
In this article we explore how to impress employers with a spot-on CV.