ring system
noun
1 Astronomy one around a planet.
2 Chemistry one in an organic molecule.
Origin
Mid 19th century.
- plano-
- planoconcave
- planoconvex
- plano-cylindrical
- plan of action (or campaign or attack)
- planogamete
- planogametic
- planogram
- planograph
- planographic
- planography
- planometer
- planometric
- planometry
- plano-miller
- plano-milling machine
- planont
- planorbiform
- Planorbis
- planorboid
- planosol
- planosolic
- plano-spherical
- planospiral
- planospore