(metrology) A standard set of units of measurement for use in scientific literature worldwide. The newest and most widespread version of the metric system.

A piston or a rotary heat engine directly powered by the products of intermittent combustion of a fuel.

(military) A call sign assigned in accordance with the provisions of the International Telecommunications Union to identify a radio station. The nationality of the radio station is identified by the first or the first two characters. (When used in visual signaling, international call signs are referred to as “signal letters.”)

plural of internal combustion engine

The law of a state that decides the law of which state is applied to legal relationships in civil and commercial matters that contain foreign elements.

(art) An intense deep blue hue achieved by means of ultramarine pigment and a binder.

(nautical) A mark on the hull of a merchant ship to show the waterline under specified conditions, indicating the maximum load that the ship may carry.

A sport created as a mixture of Australian rules football and Gaelic football, to allow international matches between Australia and Ireland.

plural of internally displaced person

plural of internal-combustion engine