Definition of gaseity in English:

gaseity

noun

rare
  • Gaseous character; the state or condition of being a gas.

Origin

Early 19th century; earliest use found in William Nicholson. From gas + -eity, after either gaseous or French gazéité.

Pronunciation

gaseity

/ɡəˈsiːɪti//ɡeɪˈsiːɪti/