English

telespectroscope

From tele- + spectroscope.

Proto-Indo-European *kʷel- ‘to turn, revolve’

Ancient Greek τῆλε ‘at a distance, far off, far away, far from’

English tele-

Today it means

noun A spectroscope designed to be attached to a telescope for observation of distant objects, such as stars.

Language periods are conventional ranges, not dates for this word.

Etymograph / telespectroscope