出典:Wiktionary
出典:『Wiktionary』 (2025/11/21 16:45 UTC 版)
From helio- + -meter, from Ancient Greek Ἥλιος (Hḗlios), from ἥλιος (hḗlios, “sun”), and French mètre, from Ancient Greek μέτρον (métron, “measure”).
heliometer (plural heliometers)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/18 00:32 UTC 版)
Heliometer (from Greek sun and measure) is an instrument originally designed for measuring the variation of the sun's diameter at different seasons of the year, but applied now to the modern form of the instrument which is capable of much wider use.[1]