单词 | macrometer |
释义 | macrometer|mæˈkrɒmɪtə(r)| [f. macro- + -meter.] An instrument for measuring distant or inaccessible objects.
1825W. Hamilton Handbk. Terms Arts & Sci., Macrometer, in Mathematics, an instrument contrived to measure the distance of inaccessible objects by means of two reflectors on a common sextant. 1888Encycl. Brit. XXIII. 126/1 Porro's telemeter, Elliott's telescope, and Nordenfelt's macrometer illustrate the principle. |

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