river in Canada, named for Scottish fur trader and explorer Sir Alexander Mackenzie, who discovered and explored it 1789.
updated on November 30, 2017
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。