from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A period of sleep that lasts up to a few seconds, usually experienced by people who have narcolepsy or are severely deprived of sleep.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A brief period of sleep, usually of a few seconds, that may result from sleep deprivation or various medical conditions.
micro- + sleep (Wiktionary)