optical C1 Topic:Describing Qualities US /ˈɑptɪkəl/ UK /ˈɒptɪkəl/ See IPA manual Freq #17553 Meanings 1 adj Relating to sight or the eyes. She went to the optical shop to order new glasses. 2 adj Relating to light, or designed to work with light. A microscope is an optical instrument. 3 adj Using devices that detect or respond to light. The door opens automatically thanks to an optical sensor. Thesaurus Synonyms 1 adj · relating to sight or the eyes. ocularoptic Word family Derived forms autopticalbioopticalbiopticalelectroopticalflopticalmagnetoopticalmagnetopticalmonopticalnon-opticalnonopticalopticalityoptically Appears in Phrases (2) See all optical illusion a visual effect that makes something appear different from how it actually is Adjective + noun optical pyrometer an instrument estimating temperature from the light emitted by a hot object Adjective + noun Etymology From optic + -al. Topics Describing Qualities Word Formation & Derivatives External links Google Images Cambridge Dictionary Wiktionary # optical **Type:** Word **Level:** C1 **Part of speech:** adj **IPA (US):** /ˈɑptɪkəl/ **IPA (UK):** /ˈɒptɪkəl/ **Frequency rank:** 17553 ## Meanings 1. Relating to sight or the eyes. 2. Relating to light, or designed to work with light. 3. Using devices that detect or respond to light. ## Examples - She went to the optical shop to order new glasses. - A microscope is an optical instrument. - The door opens automatically thanks to an optical sensor. ## Derived Forms - autoptical - biooptical - bioptical - electrooptical - floptical - magnetooptical - magnetoptical - monoptical - non-optical - nonoptical - opticality - optically ## Etymology From optic + -al. ## Topics - Describing Qualities - Word Formation & Derivatives markdown