- optical (adj.)
[optical 词源字典]
- 1560s, from optic + -al (1). Of abstract art, from 1964. Related: Optically.[optical etymology, optical origin, 英语词源]
- racemization
- "Conversion of an optically active substance into a racemic (and so optically inactive) form", Late 19th cent. From racem- + -ization. Compare French racémisation.