expansivity

[ ek-span-siv-i-tee ]
/ ˌɛk spænˈsɪv ɪ ti /

noun

the quality or state of being expansive; expansiveness.

Origin of expansivity

First recorded in 1830–40; expansive + -ity

British Dictionary definitions for expansivity

expansivity
/ (ˌɛkspænˈsɪvɪtɪ) /

noun

the quality of being expansive
another name for coefficient of expansion