noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A sedative hypnotic drug of the pyrazolopyrimidine class, mainly used to treat insomnia, rare among such drugs in having been found not to cause an increase in road traffic accidents. uncountable

Etymology

Probably from Ancient Greek ζάλη (zálē, “storm, distress”) + -plon (“imidazopyrimidine or pyrazolopyrimidine derivative”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.