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Noun: expansivity  ,ek,span'si-vu-tee
  1. The fractional change in length, area or volume per unit change in temperature at a given constant pressure
    "The expansivity of mercury makes it suitable for use in thermometers";
    - coefficient of expansion
     
  2. A quality characterized by magnificence of scale or the tendency to expand
    "the expansivity of their extravagant life style was soon curtailed";
    - expansiveness
     
  3. A friendly open trait of a talkative person
    "Her expansivity made everyone feel welcome at the party";
    - effusiveness, expansiveness

Derived forms: expansivities

Type of: coefficient, communicativeness, grandness, impressiveness, magnificence, richness

Encyclopedia: Expansivity