외과가 · 외과를
surgery (department), general surgery
Example
다리를 다쳐서 외과에서 치료를 받았어요.
I hurt my leg, so I got treated in the surgery department.
Word parts
외 outside+과 department
Literally 'outside department' — injuries and operations.
Good to know
For sprains and bone or joint pain, Koreans usually go to 정형외과 (orthopedics).