# lemniscate

> English word · Noun · IPA /lɛmˈnɪs.kɪt/

## Definitions
1. A closed curve having the shape of a figure eight or an infinity symbol (∞).
2. The lemniscate of Bernoulli
3. Any of a variety of quartic functions producing similar figure-of-eight closed curves.

## Etymology
First attested in 1781; borrowed from New Latin lēmniscāta (figūra), substantivized from lēmniscātus (“decorated with ribbons”), from lēmniscus (“a sort of ribbon”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/lemniscate