Under the Whyte notation system, a steam locomotive that has four leading wheels on a leading truck followed by ten coupled driving wheels, and no trailing wheels.

Under the Whyte notation system, a steam locomotive that has a single-axle leading truck followed by five powered driving axles, and no trailing wheels.

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

Under the Whyte notation system, a steam locomotive, with six axles connecting twelve powered driving wheels, and no leading wheels or trailing wheels.

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of ten driving wheels, and two trailing wheels on a trailing truck.

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

Hundreds.

Alternative spelling of eleventh grade

Alternative spelling of tenth grade

A timekeeping convention in which the 24 hours of the day are divided into two periods called ante meridiem and post meridiem.