Definition of lemniscate
: a figure-eight shaped curve whose equation in polar coordinates is ρ2=a2 cos 2θ or ρ2=a2 sin 2θ
Origin and Etymology of lemniscate
New Latin lemniscata, from feminine of Latin lemniscatus with hanging ribbons, from lemniscus
First Known Use: circa 1781See Words from the same year
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