HO gauge

[ eych-oh ]

noun

1. a model railroad gauge of 0.65 inch (16.5 millimeters).

Word History and Origins

Origin of HO gauge¹

h(alf ) O gauge

Example Sentences

O-gauge sets are electric sets that are approximately 1:48 ratio; HO gauge are 1:87 ratio; and N gauge refers to a 1:148 scale.

From Washington Times

Its members, bright-eyed and crew-cutted upperclassmen who spoke with the spasmodic cadences of people who want words out of the way in a hurry, boasted a spectacular display of HO gauge trains they had in a permanent clubroom in Building 20.

From Project Gutenberg