1. (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms
   - life force, vital force, vitality

Type of: force

• asthenia
• asthenic
• asthenic type
• asthenopia
• asthenosphere
• astheny
• asthma
• asthma attack
• asthmatic
• Asti
• Asti Spumante
• astigmatic
• astigmatism
• astigmia
• astilbe
• Astilbe biternata
• Astilbe chinensis pumila
• Astilbe japonica
• astir
• astomatal
• astomatous
• astonied
• astonish
• astonished
• astonishing