单词 | index-arm |
释义 | > as lemmasindex-arm index-arm n. = sense 2b. ΘΚΠ the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > part of a surveying instrument > index arm index?a1560 index-arm1879 1879 S. Newcomb & E. S. Holden Astron. for Schools & Coll. 92 The index-arm carries the index-glass. < as lemmas |
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