0 in or relating to the state of sleep:
New technology allows scientists to watch the sleeping brain at work.
Our sleeping environments are better than they ever have been.
Reducing the amount of caffeine you consume should solve your sleeping problems.
This is the first dinosaur fossil found in a sleeping position.
A special section in the book contains advice on better sleeping.
It's a condition in which there are difficulties in breathing during sleeping.
Unlike eating or sleeping, playing a game is the only universal human activity that is not a necessity.
