Obdormition n. : Sleep.

Example:
33 Names of Things You Never Knew had Names?

Taxonomy
Obdormition, Symptom, free encyclopedia, limb, medical symptom, Search, paresthesia, Nerve, anatomy, IPA, English, medical term, numbness, pressure, movement, going to sleep, colloquially, pins and needles.

Defination from the web:
Obdormition. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Obdormition (pronounced /ˌɒbdɔrˈmɪʃən/) is a medical term describing numbness in a limb, often caused by constant pressure on nerves or lack of movement. ...