lemniscate

noun
lem·​nis·​cate | \lem-ˈni-skət \

Definition of lemniscate 

: a figure-eight shaped curve whose equation in polar coordinates is ρ2=a2 cos 2θ or ρ2=a2 sin 2θ

First Known Use of lemniscate

circa 1781, in the meaning defined above

History and Etymology for lemniscate

New Latin lemniscata, from feminine of Latin lemniscatus with hanging ribbons, from lemniscus

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Dictionary Entries near lemniscate

lemnad

Lemnian

Lemnian bole

lemniscate

lemniscus

Lemnos

lemon

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The first known use of lemniscate was circa 1781

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