1. Of or relating to the science of ecology
   - ecological, ecologic, bionomical

See also: bionomics

• differential gear
• differential limen
• differential psychology
• differential threshold
• differentially
• differentiate
• differentiated
• differentiation
• differentiator
• differently
• difficile
• difficult
• difficultly
• difficultness
• difficulty
• diffidence
• diffident
• diffidently
• difflugia
• diffract
• diffraction
• diffraction grating
• diffractive
• diffuse
• diffuse nebula