FAQs About the word photoheliometer

写真日時計

A double-lens instrument for measuring slight variations of the sun's diameter by photography, utilizing the common chord of two overlapping images.

No synonyms found.

No antonyms found.

photoheliograph => 写真日誌儀, photogravure => 写真彫刻, photography => 写真, photographone => フォノグラフ, photographometer => 光度計,