1913 as short for pre-operative (preparation). Pre-operative as an adjective, "given or occurring before a surgical operation" is by 1904.
updated on October 07, 2020
英语词源词典收录了45867条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。