1. Of or related to or exhibiting allotropism
   - allotropic

See also: allotropism

• Raphicerus campestris
• Raphidae
• Raphidiidae
• Raphus
• Raphus cucullatus
• rapid
• Rapid City
• rapid climb
• rapid eye movement
• rapid eye movement sleep
• rapid growth
• rapid transit
• rapid-fire
• rapidity
• rapidly
• rapidness
• rapier
• rapine
• rapist
• Rappahannock
• Rappahannock River
• rapparee
• rappee
• rappel
• rappeller