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

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

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

plural of 12mo

The decade from 120 to 129. / plural of 120

An aerial maneuver in which the performer spins through three-and-a-half full revolutions.

plural of 1260

The radioactive isotope of tellurium ¹²⁸₅₂Te

plural of 12th grader

(microbiology) Geogemma barossii, an archaea, the hottest hyperthermophile known.