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

Under the Whyte notation system, a steam locomotive that has a four-wheel leading truck followed by a single driving axle.

Under the Whyte notation system, a steam locomotive that has an unpowered three-axle leading truck followed by a single powered driving axle.

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

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

plural of number 2 pencil

A diet that stipulates calorie restriction for two non-consecutive days per week but allows unconstrained eating on the other five days.

Under the Whyte notation system, a steam locomotive that has four coupled leading wheels, twelve coupled driving wheels, and one pair of trailing wheels.

(rail transport) Under the Whyte notation system, a steam locomotive that has four coupled leading wheels, six coupled driving wheels, and a pair of trailing wheels. Also known in UK English as a "Pacific" locomotive.

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