adenochrome

noun
aden·​o·​chrome | \ə-ˈde-nə-ˌkrōm -ˈdē-\
plural -s

Definition of adenochrome 

: an acidic red pigment found in the branchial hearts of the octopus

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First Known Use of adenochrome

circa 1943, in the meaning defined above

History and Etymology for adenochrome

aden- + -chrome

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The first known use of adenochrome was circa 1943

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