non-invasive
/ˌnɒnɪnˈveɪsɪv/adjective
1
- (of medical procedures) not involving the introduction of instruments into the body（医疗程序）器械不进入体内的：
non-invasive techniques such as ultrasound.
如超声波这样的器械不进入体内的技术。
2
- (of a cancerous disease) not tending to spread（癌症）非扩散的。
2.1
- (of plants) not tending to spread undesirably（植物）非恶性蔓延的, 非侵害的。