Selenium eye

Noun

Definitions

1.NounA device consisting of a closeable ball of blackened wood surrounding a glass lens that focuses light onto a selenium cell attached to a galvanometer; used by astronomers to measure the light variations of a heavenly body.

Synonyms

scioptic ball selenoscope solar microscope spectrohelioscope helioscope solar telescope spyglass gazing ball night glass telescope finderscope reflecting circle

🔗 Find words with "selenium eye" in A2Z Word Finder

The Daily Word NerdA new word, a puzzle, and a fun fact — free in your inbox every morning.

Free forever · unsubscribe anytime · all 14 newsletters

That email did not go through — please check it and try again.