Sleep lasting for a very short period of time (specifically up to ten seconds), seen especially in persons with sleep disorders; an occasion of such sleep.
Origin
1940s. From micro- + sleep.
Definition of microsleep in US English:
microsleep
nounˈmʌɪkrə(ʊ)sliːp
Sleep lasting for a very short period of time (specifically up to ten seconds), seen especially in persons with sleep disorders; an occasion of such sleep.