anaerobic digestion
noun
The decomposition of sewage or other waste material by anaerobic microorganisms.
Origin
1920s.
- ground clutter
- ground control
- ground controller
- ground cover
- ground crew
- ground dove
- ground down
- ground effect
- ground elder
- grounder
- ground floor
- ground forces
- ground frost
- ground game
- ground glass
- groundhog
- Groundhog Day
- groundhopper
- ground-in
- grounding
- grounding wire
- ground ivy
- groundkeeper
- groundless
- groundlessly