lemniscate.
A closed curve having the shape of a figure eight or an infinity symbol (∞).
Meaning & usage
A closed curve having the shape of a figure eight or an infinity symbol (∞).
The lemniscate of Bernoulli
Any of a variety of quartic functions producing similar figure-of-eight closed curves.
Where this word comes from
First attested in 1781; borrowed from New Latin lēmniscāta (figūra), substantivized from lēmniscātus (“decorated with ribbons”), from lēmniscus (“a sort of ribbon”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.