notum

noun
no·tum | \ˈnō-təm \
plural nota\ˈnō-tə \

Definition of notum 

: the dorsal surface of a thoracic segment of an insect

First Known Use of notum

1877, in the meaning defined above

History and Etymology for notum

New Latin, from Greek nōton back

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The first known use of notum was in 1877

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