exteroception
- n sensitivity to stimuli originating outside of the body
exteroceptor
- n any receptor that responds to stimuli outside the body
extinction
- n no longer active; extinguished
the extinction of the volcano - n no longer in existence
the extinction of a species - n the reduction of the intensity of radiation as a consequence of absorption and radiation
- n complete annihilation
they think a meteor cause the extinction of the dinosaurs - n a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
- n the act of extinguishing; causing to stop burning
the extinction of the lights
extinction angle
- n the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light
extinguisher
- n a manually operated device for extinguishing small fires
extinguishing
- n the act of extinguishing; causing to stop burning
- v put an end to; kill
- v put out, as of fires, flames, or lights
- v extinguish by crushing
- v terminate, end, or take out
- v kill in large numbers
extirpation
- n surgical removal of a body part or tissue
- n the act of pulling up or out; uprooting; cutting off from existence