Noah Webster
Heliometer
HELIOM'ETER, noun [Gr. the sun, and to measure.] An instrument for measuring with exactness the diameter of the heavenly bodies. It is called also astrometer.
HELIOM'ETER, noun [Gr. the sun, and to measure.] An instrument for measuring with exactness the diameter of the heavenly bodies. It is called also astrometer.