(photography, computer graphics) A histogram that acts as a graphical representation of the tonal distribution in a digital image.

Something that disrupts smooth operation or functioning; used especially in phrases such as throw a spanner in the works, put a spanner in the works etc.

plural of spanner in the works

Algae adapted to grow on ice, different species growing on freshwater and saltwater ice.

plural of ice alga

A form of design research where the researcher observes a user doing his/her normal activities and discusses what is happening.

A fanciful notion; an unrealistic or ludicrous concept.

(automotive) An engine that has all cylinders in one line or row.

plural of special interest group

plural of interest group