general anaesthetic       
noun [ C or U ] mainly UK (US usually general anesthetic) uk/ˌdʒen.ər.əl æn.əsˈθet.ɪk/ us/ˌdʒen.ɚ.əl æn.əsˈθet̬.ɪk/
 全身麻醉剂
a drug that is used to make you unconscious when you have an operation, so that you do not feel any pain
  Surgery is usually performed under general anaesthetic.
 A chest infection may develop after a general anaesthetic.
 - More examples
- They gave me a general anaesthetic and the operation took less than an hour.
- Surgical biopsy is more invasive and requires a general anaesthetic.
- Obesity and heart problems make some patients more at risk of a bad reaction to general anaesthetic.