outline vs separatrix

outline

noun
  • A line marking the boundary of an object figure. 

  • The outer shape of an object or figure. 

  • A prose telling of a story intended to be turned into a screenplay; generally longer and more detailed than a treatment. 

  • A sketch or drawing in which objects are delineated in contours without shading. 

  • A general description of some subject. 

  • A preliminary plan for a project. 

  • A statement summarizing the important points of a text. 

  • A setline or trotline. 

verb
  • To optimize for size by replacing repeated code fragments with function calls. 

  • To draw an outline of. 

  • To summarize. 

separatrix

noun
  • A terminator: a line on a partially-illuminated surface separating the lit and shaded regions. 

  • The ⟨L⟩ or pipe ⟨|⟩ mark formerly used to divide integers from decimals. 

  • 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. 

  • The line between regions having different magnetic fields. 

  • The boundary separating two modes of behavior in a differential equation. 

How often have the words outline and separatrix occurred in a corpus of books? (source: Google Ngram Viewer )