noun
arc discharge
Technical term in physics and electrical engineering for a sustained electrical discharge through a gas, producing an arc.
アーク放電は溶接や照明に利用される。
Arc discharge is used in welding and lighting.
放電 is a general term for electrical discharge; アーク放電 specifies the arc type.
Compound of アーク (from English 'arc') and 放電 (discharge).