英语词汇quadrant的起源、历史背景-英语词源词典

词汇	quadrant
词源	quadrant. Used in astronomy and navigation since its devel- opment centuries ago, the quadrant is an instrument properly having the form of a graduated quarter circle that is used for making angular measurements, especially for taking latitudes in navigation. It takes its name from the Latin quadrant, “fourth part,” or quarter.
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英语词源词典收录了13259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。