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extenuating circumstances
exterior
exterior angle
exteriorize
exterminate
exterminator
extern
external
external benefit
external-combustion engine
external constraint
external cost
external degree
external diseconomies of scale
external ear
external examination
external finance
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exteroceptor

ex·ter·o·cep·tor [ èkstərō séptər ] (plural ex·ter·o·cep·tors)


noun 
Definition:
 
sense organ: a body part or sensory organ that is able to receive outside stimuli, e.g. the eye, ear, or any of the nerve endings in the skin

[Early 20th century. < Latin exter "outward, on the outside" + receptor]

ex·ter·o·cep·tive adjective
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