Medicine. That causes loss or impairment of physical sensation or consciousness (cf. stupor, n. 1a); †analgesic (obsolete); narcotic. Now rare.

Medicine. That has the property of allaying, assuaging, or soothing.

Of a substance or its properties: producing sleep or stupefaction; having the effect of a narcotic; of the nature of a narcotic.

Originally: made with or containing opium; inducing sleep or sedation; narcotic. Later: of the nature of an opiate.

= narcotic, adj. 1.

= soporific, adj. 1b. Also figurative. ?Obsolete. (Common in the 17th cent.)

Inducing sleep; soporific.

= soporific, adj. n.

Calming, sedative.

= opiate, adj. 1.

Of or relating to opiates or their use; of the nature of or resembling an opiate. Now rare.

Of or derived from opium; thebaic extract, thebaic tincture, laudanum.

Inducing or tending to induce sleep; causing a person to sleep or slumber. Of medicaments, drugs, etc. (Cf. soporiferous, adj. 2b.)

Possessing both narcotic and irritant properties.

Having the quality of lowering the activity of the vital functions; sedative.

containing or resembling opium.