REM

Rapid eye movement (sleep). Deep sleep with rapid eye movements in which dreaming takes place. One of the five stages of sleep. During REM sleep, the eyes move rapidly while closed and dreams occur. REM sleep is the lightest stage of sleep, during which a person may...

Remission

The disappearance of symptoms; the disappearance of the tumor. A decrease in or disappearance of signs and symptoms of a tumor or cancer. In partial remission, some, but not all, signs and symptoms have disappeared. In complete remission, all signs and symptoms have...

Respiration

Breathing. To inhale and exhale The words “respiratory” and “respiration” refer to the lungs and breathing, or the movement of respiratory gases, oxygen and carbon dioxide, into and out of the lungs; or a single complete act of breathing. The...