separatrix
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separatrix
- /sɛpəˈɹeɪtɹɪks/
Rhymes with -eɪtɹɪks
Where it comes from
Learned borrowing from Latin sēparātrīx, the feminine form of separator (originally owing to an implied līnea (“line”)), from sēparāre (“to divide; to separate”) + -trix (forming female agents). By surface analysis, separate + -trix. First developed as a decimal mark among the medieval Arab mathematicians, whence a shorter variant gave rise to the decimal comma employed by many European countries and their former colonies.
noun separatrixes · separatrices
- The ⟨L⟩ or pipe ⟨|⟩ mark formerly used to divide integers from decimals. Therefore in writing of decimall parts let the separatrix be always used.
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Synonym of decimal point, which replaced such marks.
Similar: decimal point, which replaced such marks
- The proofreader's mark resembling a slash ⟨ / ⟩ or vertical bar ⟨ | ⟩ placed after a note in the margin to indicate that it should replace the item(s) struckthrough in the running text or to separate it from other margin notes.
- A terminator: a line on a partially-illuminated surface separating the lit and shaded regions.
- The line between regions having different magnetic fields.
- The boundary separating two modes of behavior in a differential equation.
Talk about this word "separatrix." Wiktionary, via Micwyn, micwyn.com/word/separatrix. Accessed 6 Nov. 2026. separatrix. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/separatrix "separatrix." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/separatrix.Cite this
@misc{separatrix_2026,
title = {separatrix},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/separatrix},
urldate = {2026-11-06}
}
