sleep
naturally recurring resting state of mind and body
co-sleeping
practice in which babies and young children sleep close to a parent(s) instead of in another room
avian sleep
sleep in birds
polyphasic sleep
any sleep pattern with multiple periods of sleep in a 24-hour period
Infant sleep
sleep in infant humans
sleep
sleep in non-human beings
sopor
condition of abnormally deep sleep or a stupor from which it is difficult to rouse
rapid eye movement sleep
unique phase of sleep in mammals and birds, characterized by random/rapid movement of the eyes
non-rapid eye movement sleep
brain state during sleep
deep sleep therapy
psychiatric treatment
winter rest
annual state for some plants and animals
incubation
religious practice of sleeping in a sacred area with the intention of experiencing a divinely inspired dream or cure