1. Characterized by the interdependence of living organisms in an environment
   - ecological 
2. Of or relating to the science of ecology
   - ecological, bionomical, bionomic

See also: ecology

• car park
• car part
• car pool
• car race
• car racing
• car rental
• car seat
• car sickness
• car tire
• car traffic
• car train
• car transporter
• car tyre
• car wash
• car wheel
• car window
• car-ferry
• car-mechanic
• carabao
• carabid
• carabid beetle
• Carabidae
• carabineer
• carabiner
• carabinier