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

• somewhere
• somite
• Somme
• Somme River
• sommelier
• sommer
• somnambulate
• somnambulation
• somnambulism
• somnambulist
• somniferous
• somnific
• somniloquism
• somniloquist
• somniloquy
• somnolence
• somnolent
• somnolently
• Somrai
• son
• son of a bitch
• son of a gun
• son-in-law
• sonant
• sonar