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

• purgative
• purgatorial
• purgatory
• purge
• purger
• purging
• purging cassia
• puri
• purification
• purifier
• purify
• purifying
• Purim
• purine
• Purinethol
• purism
• purist
• puritan
• puritanic
• puritanical
• puritanically
• Puritanism
• purity
• Purkinje
• Purkinje cell