noun which may take the genitive case particle 'no', noun
Describes a process or device that is partly automatic and partly manual. Commonly used with machinery, weapons, and systems.
この洗濯機は半自動なので、水の切り替えは手動です。
This washing machine is semi-automatic, so you have to switch the water manually.
半自動の拳銃は一発撃つ
A semi-automatic pistol automatically loads the next round after firing one shot.
手動 means manual, entirely operated by hand, in contrast to the partial automation of 半自動.
Compound of 半 (half) and 自動 (automatic).