a period of sleep which is so momentary as to be imperceptible
microsleep in American English
(ˈmaikrouˌslip)
noun
Psychology
a moment of sleep followed by disorientation, experienced esp. by persons suffering from narcolepsy or sleep deprivation
Word origin
[1940–45; micro- + sleep]This word is first recorded in the period 1940–45. Other words that entered Englishat around the same time include: Rh factor, debrief, set-aside, silkscreen, updatemicro- is a combining form with the meanings “small” (microcosm; microgamete), “very small in comparison with others of its kind” (microcomputer; microlith), “too small to be seen by the unaided eye” (microfossil; microorganism), “dealing with extremely minute organisms, organic structures, or quantities ofa substance” (microdissection; microscope), “localized, restricted in scope or area” (microburst; microhabitat), “(of a discipline) focusing on a restricted area” (microeconomics), “containing or dealing with texts that require enlargement to be read” (microfilm; microreader), “one millionth” (microgram)