separatrix

名词 n.
中文释义

英文释义

名词 n.
  1. The ⟨L⟩ or pipe ⟨|⟩ mark formerly used to divide integers from decimals. historical
    — Therefore in writing of decimall parts let the separatrix be always used.
  2. Synonym of decimal point, which replaced such marks. obsolete
  3. 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.
  4. A terminator: a line on a partially-illuminated surface separating the lit and shaded regions.
  5. The line between regions having different magnetic fields.
  6. The boundary separating two modes of behavior in a differential equation.

词形变化

separatrixes plural separatrices plural

词源

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.
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