An induction cut is the shortest possible hairstyle without shaving the head with a razor. The style is so named as it is traditionally the first haircut given to new male recruits during initial entry into many of the world's armed forces, but most particularly in the United States.

The induction haircut has both practical and psychological purposes. Originally, one of the reasons for the induction haircut was to reduce the chances of disease among closely quartered recruits from different geographical areas (with varying immunities), such as head lice. However, the haircut also has the psychological purpose of stripping recruits of their individuality and promoting the "team" mentality desirable in a platoon of military recruits.