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heliometerHELIOM'ETER, n. [Gr. the sun, and to measure.] An instrument for measuring with exactness the diameter of the heavenly bodies. It is called also astrometer. |
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heliometerHELIOM'ETER, n. [Gr. the sun, and to measure.] An instrument for measuring with exactness the diameter of the heavenly bodies. It is called also astrometer. |