A government agency found in many countries, responsible for investigating and preventing criminal manipulation of finance systems.

(mathematics) The function whose value is zero if its independent variable is negative, and one otherwise.

plural of unidentified flying object

A device that is placed over or behind the propeller of a boat to deflect the vessel's propwash downward. The result is a very effective form of agitation dredging. PDUs are primarily used by salvors to remove mud or sand from shallow water shipwrecks.

unable to be imagined; inconceivable or mind-boggling; beyond belief

A unit of measurement which is not itself defined in terms of other units, and from which other units may be derived. / The main unit of a computer or hi-fi system.

Any simple step in a multi-step chemical engineering process; examples include distillation, evaporation, mixing, filtration, crystallization etc.

A religion which encourages theological liberalism and an individual search for truth and the adherents of which draw on many different theological sources and have a wide range of beliefs and practices.

Pertaining to only one direction, e.g.: where all component parts are aligned in the same direction in space.

A fabric in which the majority of fibers run in the same single direction.