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

• shock treatment
• shock troops
• shock wave
• shock-absorbent
• shock-headed
• shockable
• shocked
• shocker
• shocking
• shocking pink
• shockingly
• Shockley
• shockproof
• shod
• shodden
• reef knot
• reef squirrelfish
• reef whitetip shark
• reefer
• reefy
• reek
• reeking
• reeky
• reel
• reel off