ring system
noun
1 Astronomy one around a planet.
2 Chemistry one in an organic molecule.
Origin
Mid 19th century.
- Arabian jasmine
- Arabian mustard
- Arabian-night
- Arabian Nights
- Arabian-nights'
- Arabian peninsula
- Arabian Sea
- Arabic
- arabica
- arabic acid
- Arabically
- Arabicisation
- Arabicise
- Arabicism
- Arabicization
- Arabicize
- Arabic numeral
- Arabidopsis
- arability
- arabin
- arabine
- arabinic acid
- arabinogalactan
- arabinogalactane
- arabinose