1. Depending on free oxygen or air
   - aerobic, aerophilic

See also: aerobiotic, oxidative

• ring-around-the-rosy
• ring-binder
• ring-fence
• ring-necked
• ring-necked parakeet
• ring-necked pheasant
• ring-necked snake
• ring-shaped
• ring-stalked fungus
• ring-tailed
• ring-tailed cat
• ring-tailed lemur
• ringbolt
• ringbone
• ringdove
• ringed
• ringed snake
• ringer
• Ringer solution
• Ringer's solution
• ringgit
• Ringgold Wilmer Lardner
• ringhals
• ringing
• ringleader