(dated) pressure volume diagram

A diagram used to describe corresponding changes in volume and pressure in a system, commonly used in thermodynamics and physiology.

An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.

(dated) telephone number

A nickname for Delaware.

A disposable diaper made from paper and plastic, rather than cloth.

(geology, mineralogy) A form of quartz crystal found within geodes of the Avon Gorge.

plural of diamond bracket

(computing) Synonym of angle bracket

A ground-level cloud composed of tiny ice crystals.