expansivity

Noun
  1. The fractional change in length or area or volume per unit change in temperature at a given constant pressure (synset 113609828)
    is a type of: coefficient - a constant number that serves as a measure of some property or characteristic
    same as: coefficient of expansion
  2. A quality characterized by magnificence of scale or the tendency to expand (synset 104736968)
    "the expansiveness of their extravagant life style was soon curtailed"
    is a type of: grandness, impressiveness, magnificence, richness - splendid or imposing in size or appearance
    same as: expansiveness
  3. A friendly open trait of a talkative person (synset 104658366)
    is a type of: communicativeness - the trait of being communicative
    same as: effusiveness, expansiveness

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