The point at which the assumed truths of an artificial or imagined reality are eroded to reveal actual reality.

Any system designed to collect solar radiation for producing thermal energy, which may be used for space heating or for electricity generation.

A short unfolded stand-up collar on a shirt or jacket.

plural of white-collar crime

plural of collateral science

A science of importance in medicine but not part of medicine, especially physics, chemistry and botany. Sometimes also including anatomy and physiology.

plural of collision mat

plural of collision bulkhead

A dog of a long-haired breed originating from Scotland, originally used as sheepdogs.

(Britain, informal) To arrest someone.