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- optical:  Greek optós meant ‘visible’ (it was presumably related to ophthalmós ‘eye’, source of English ophthalmic , and belonged to the general Indo-European family of ‘eye’/‘see’- words – including English eye itself – that goes back to the base *oqw-). From it was derived optikós, which has given English optic  and optical. Optician  originated as a French coinage.
- optical (adj.)
- 1560s, from optic + -al (1). Of abstract art, from 1964. Related: Optically.
- 1. Sloping walls on the bulk of the building create an optical illusion.
- 2. The camera combines rugged reliability with unequalled optical performance and speed.
- 3. These optical fibres may be used for new sorts of telephony.
- 4. optical instruments such as microscopes and telescopes
- 5. They concentrated on better definition of the optical image.
[ optical 造句 ]