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Diopter; Dioptra

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Webster's 1828 Dictionary · 1828

Part of speech: noun (n.)

An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.

Noah Webster's American Dictionary of the English Language (1828). Structured JSON vendored from sktzofrenic/webster1828 at commit 5a58d9e0191eefaa51affbc1bb1b8bc5782ba6c0. The upstream README identifies the dictionary text as public domain and the project license as MIT.

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