(music) A meter of two half notes per measure.

Under the Whyte notation system, a steam locomotive that has two leading wheels, two driving wheels and two trailing wheels.

Under the Whyte notation system, a steam locomotive that has two coupled driving wheels followed by two trailing wheels, with no leading wheels.

Under the Whyte notation system, a steam locomotive that has one unpowered leading axle and one powered driving axle.

Under the Whyte notation system, a steam locomotive that has four leading wheels arranged in a leading truck, two driving wheels and two trailing wheels.

Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two coupled driving wheels and four trailing wheels.

plural of 2-2-2

plural of 2-2-4

plural of 2-2-0

Under the Whyte notation system, a Garratt steam locomotive that is articulated in three parts, with a boiler mounted on the centre frame, and two steam engines mounted in opposite directions on separate frames, one on each end of the boiler, and each engine having a 2-6-4 wheel configuration.