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We found 2 dictionaries with English definitions that include the word optical telescopes:
Click on the first link on a line below to go directly to a page where "optical telescopes" is defined.

General (2 matching dictionaries)

1. optical telescopes: Vocabulary.com [home, info]
2. optical telescopes: Wiktionary [home, info]

(Note: See optical_telescope for more definitions.)

Quick definitions from WordNet (optical telescope) ▸ noun:  an astronomical telescope designed to collect and record light from cosmic sources ▸ Also see optical_telescope ▸ Words similar to optical telescopes ▸ Usage examples for optical telescopes ▸ Idioms related to optical telescopes (New!) ▸ Words that often appear near optical telescopes ▸ Rhymes of optical telescopes ▸ Invented words related to optical telescopes