longitudinal vs oblique

longitudinal

adj
  • Forward and/or backward, relative to some defined direction. 

  • Relating to length, or to longitude. 

  • Running in the direction of the long axis of a body. 

  • Sampling data over time rather than merely once. 

noun
  • Any longitudinal piece, as in shipbuilding etc. 

  • A railway sleeper lying parallel with the rail. 

oblique

adj
  • Not erect or perpendicular; not parallel to, or at right angles from, the base. 

  • Having the base of the blade asymmetrical, with one side lower than the other. 

  • Disingenuous; underhand; morally corrupt. 

  • Not direct in descent; not following the line of father and son; collateral. 

  • Pertaining to the oblique case (non-nominative). 

  • Growing at an angle that is neither vertical nor horizontal. 

  • Indirect; employing the actual words of the speaker but as related by a third person, having the first person in pronoun and verb converted into the third person and adverbs of present time into the past, etc. 

  • Not straightforward; obscure or confusing. 

  • Employing oblique motion, motion or progression in which one part (voice) stays on the same note while another ascends or descends. 

noun
  • Synonym of slash ⟨/⟩. 

  • An oblique line. 

  • The oblique case. 

verb
  • To deviate from a perpendicular line; to become askew; 

  • To slant (text, etc.) at an angle. 

  • To march in a direction oblique to the line of the column or platoon; — formerly accomplished by oblique steps, now by direct steps, the men half-facing either to the right or left. 

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