| 单词 | groma |
| 释义 | groma /groh"meuh/, n. (in ancient Roman surveying) an instrument having a cruciform wooden frame with a plumb line at the end of each arm, used for laying out lines at right angles to existing lines. [ < L groma, gruma, by dissimilation < Gk gnôma, presumably with sense of gnómon carpenter's square; see GNOMON] |
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