a large tropical snake that kills animals for food by winding itself around them and crushing them.——朗文当代大辞典

Any of various large, heavy-bodied, non-venomous snakes constituting the family Pythonidae, found in tropical parts of Africa, Asia, and Australasia, which kill their prey by constriction and have vestigial hind limbs. Also more widely: any large snake which crushes its prey (including the boas and related kinds).——牛津当代大辞典  @en