Vac"u*ist (?), n. [Cf. F. vacuiste.] One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter., is a vacuum; -- opposed to plenist.

Vac"u*ist (?), n. [Cf. F. vacuiste.] One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter., is a vacuum; -- opposed to plenist.