Friday word: Lemniscate

[med_cat]

Lemniscate, n.

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

First Known Use: circa 1781

Etymology:

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

In short, it's the infinity sign:



(today's word has been brought to you by my mom, who, as you might've guessed, is indeed a math teacher ;))