(firearms) An internally tapering metal cylinder attached to the muzzle of a shotgun, designed to constrict the spreading pattern of the shot pellets.

conical centrifuge tube (usually 15 ml or 50 ml) with a screw-cap

(colloquial, medicine) To undergo a tubal ligation.

A baby who was conceived by in vitro fertilisation and then implanted in the uterus of the mother.

A device that produces X-rays by directing energetic electrons into a metal target.

a vacuum tube in which electrons from a heated cathode are focused and deflected onto a phosphorescent screen; used in television sets etc

(electronics) An electron tube in which high-energy microwaves are produced by transferring energy from electrons

(medicine) A potentially fatal condition caused by a feeding regimen given through a tube that provides too little water and too much protein in the diet.

past participle of go down the tube

plural of test tube baby