differential vs dissimilitude

differential

noun
  • A qualitative or quantitative difference between similar or comparable things. 

  • One of two coils of conducting wire so related to one another or to a magnet or armature common to both, that one coil produces polar action contrary to that of the other. 

  • A form of conductor used for dividing and distributing the current to a series of electric lamps so as to maintain equal action in all. 

  • An infinitesimal change in a variable, or the result of differentiation. 

  • The differential gear in an automobile, etc. 

adj
  • Of or pertaining to a difference. 

  • Of or pertaining to differentiation or the differential calculus. 

  • Dependent on, or making a difference; distinctive. 

  • Having differences in speed or direction of motion. 

dissimilitude

noun
  • The quality of being diverse or different; lack of resemblance. 

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