preoperative

形容词 preoperative:

1. happening or done before and in preparation for a surgical operation

pre.op.er.a.tive

adj.（形容词）
Occurring before surgery:
手术前的：发生于外科手术前的：
例句：
preoperative preparations.
手术前准备工作

【引伸】
preop.eratively
adv.（副词）