1. Given or done or owed to each other
   - reciprocatory 
2. Moving alternately backward and forward
   - reciprocatory

See also: mutual, reciprocal, reciprocate

• genus Istiophorus
• genus Isurus
• genus Iva
• genus Ixia
• genus Ixobrychus
• genus Ixodes
• genus Jabiru
• genus Jacksonia
• genus Jacquinia
• genus Jaculus
• genus Jambos
• genus Jamesonia
• genus Jasminum
• genus Jatropha
• genus Javanthropus
• genus Jordanella
• genus Juglans
• genus Junco
• genus Juncus
• genus Juniperus
• genus Jynx
• genus Kakatoe
• genus Kalmia
• genus Kalotermes
• genus Katsuwonus