Added 9 October 2026 eszopiclone noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about eszopiclone at Wordnik → Where our words come from → The active dextrorotatory stereoisomer of zopiclone, used as a sedative to treat insomnia. Related Words: zopiclonezolpidemzapizolamzaleplonquazepamzoloperonesupidimidepazinacloneloprazolambenolizimezotepinez-drug Back to today's word