a magnetic compass incorporating a prism so that an object and its bearing can be viewed simultaneously.
单词 | θ7418 |
释义 | the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > for taking bearings (2) prismatic compass1842 a magnetic compass incorporating a prism so that an object and its bearing can be viewed simultaneously. plain-compass1868 a simple form of magnetic compass used by surveyors. |
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