Etymology
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separatrix (n.)

a line or hooked line used to separate printed figures, originally with numerals and used where modern texts use a decimal point, 1650s, from Late Latin (linea) separatrix, feminine of separator, agent noun from separare "to pull apart" (see separate (v.)). It survives in proofreading.

updated on May 10, 2022

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Definitions of separatrix from WordNet

separatrix (n.)
a punctuation mark (/) used to separate related items of information;
Synonyms: solidus / slash / virgule / diagonal / stroke
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.