#acceleration.rate  an increase in speed; "modern science caused an acceleration of cultural change"
  exclusion:  #deceleration
  supertype:  #swiftness__swiftnes__fastness  a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
  subtype:  #getaway__pickup  the attribute of being capable of rapid acceleration; "his car has a lot of pickup"
  subtype:  #precipitation.acceleration  an unexpected acceleration or hastening: "he is responsible for the precipitation of his own demise"
  subtype:  #acceleration  (physics) a rate of change of velocity
     subtype:  #centripetal_acceleration__centripetalacceleration  the acceleration toward the center that holds a satellite in elliptical orbit
     subtype:  #acceleration_unit  a unit for measuring acceleration
        subtype:  #gal.acceleration_unit  a unit of gravitational acceleration equal to one centimeter per second per second (named after Galileo)

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