半角

Adjective

 * 1)  halfwidth

Etymology
, modeled after

Noun

 * 1)  the state of being  which, in early computer encoding, occupies 1 byte, and in modern typography, visually either equals 1  or proportional

Usage notes

 * In the computing sense, CJK characters in Unicode, including the so called "halfwidth" ones, are at least 3 bytes; ASCII characters are still 1 byte, thus technically "halfwidth". In the typographic sense, non-CJK characters are proportional in most fonts, while "halfwidth" CJK characters are monospace and technically "halfwidth".