noun Etymology: French héliomètre, from hélio- 1heli- + -mètre -meter Date: 1753 a visual telescope that has a divided objective designed for measuring the apparent diameter of the sun but also used for measuring angles between celestial bodies or between points on the moon, heliometric adjective heliometrically adverb
HELIOMETER
Meaning of HELIOMETER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012