What is an instrument for determining the size or distance of inaccessible objects by means of two reflectors on a common sextant called?
macrometer — An instrument for determining the size or distance of inaccessible objects by means of two reflectors on a common sextant. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17 · Modified: 2026-07-17