extremum

noun
ex·tre·mum | \ ik-ˈstrē-məm \
plural extrema\ik-ˈstrē-mə \

Definition of extremum 

: a maximum or a minimum of a mathematical function

called also extreme value

First Known Use of extremum

1904, in the meaning defined above

History and Etymology for extremum

New Latin, from Latin, neuter of extremus

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The first known use of extremum was in 1904

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Britannica.com: Encyclopedia article about extremum

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