(UK, transport) Former name of smart motorway.

(UK, transport) A section of motorway that uses active traffic management (ATM) techniques to increase capacity by use of variable speed limits and hard-shoulder running at busy times.

Motion regarded as measured by the increase of the angle made with some standard direction by a line drawn from the moving object to a fixed point.

(engineering) Any linkage by which circular motion may be changed into motion in a straight line.

A steam reversing-gear, in marine engines.

Alternative form of who's 'she', the cat's mother.

(UK, informal) The common white and black butterfly, Pieris brassicae, of the family Pieridae. / (Australia, informal) The common white and black butterfly, Pieris rapae, of the family Pieridae.

plural of moth butterfly

The butterfly, Liphyra brassolis, family Lycaenidae, of Australia and Asia.

A mechanism in the truck of a railway carriage, etc., permitting swaying from side to side.