exteroceptor

noun
ex·​tero·​cep·​tor | \ˌek-stə-rō-ˈsep-tər \

Definition of exteroceptor 

: a sense organ excited by exteroceptive stimuli

First Known Use of exteroceptor

1906, in the meaning defined above

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The first known use of exteroceptor was in 1906

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exteroceptor

noun
ex·​tero·​cep·​tor | \-ˈsep-tər \

Medical Definition of exteroceptor 

: a sense receptor (as of touch, temperature, smell, vision, or hearing) excited by exteroceptive stimuli — compare interoceptor

More from Merriam-Webster on exteroceptor

Britannica.com: Encyclopedia article about exteroceptor

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