nightmare disorder

in DSM–IV–TR and DSM–5, a sleep disorder characterized by the repeated occurrence of frightening dreams that lead to awakenings from sleep. It was formerly known as dream anxiety disorder. See parasomnia.

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Psychology term of the day

December 23rd 2024

vasodilator

n. any drug or other agent that serves to increase the diameter of blood vessels, generally by relaxing smooth muscle in arterial walls. Vasodilators are commonly used in the treatment of hypertension and angina pectoris.