Definition that contains henri bergson
- vitality (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms
- life force (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms
- vital force (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms
- elan vital (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms