One of the mysteries of the English language finally explained.
Any of a class of compounds formed by condensation of an aldehyde or ketone with phenylhydrazine, which are typically crystalline solids and are used to characterize the parent aldehyde or ketone.
Late 19th century; earliest use found in Journal of the Chemical Society. After German Phenylhydrazon.
In this article we explore how to impress employers with a spot-on CV.