Etymology

lemniscate

lem·nis·cate
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Today it means: A closed curve having the shape of a figure eight or an infinity symbol (∞). Full definition →

New Latin lēmniscāta
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The story

  1. New Latin · borrowed fromlēmniscāta
  2. English todaylemniscate

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

Etymology from Wiktionary, CC BY-SA 4.0.