Definition of plenum:
According to Sir W. Thomson's theory of Vortex Atoms, the substance of which the molecule consists is a uniformly dense plenum, the properties of which are those of a perfect fluid, the molecule itself being nothing but a certain motion impressed on a portion of this fluid, and this motion is shewn, by a theorem due to Helmholtz, to be as indestructible as we believe a portion of matter to be.- "Five of Maxwell's Papers", James Clerk Maxwell.
- "The Student's Companion to Latin Authors", George Middleton Thomas R. Mills.
" I am still of my first opinion," answered Pangloss, " for I am a philosopher and I cannot retract, especially as Leibnitz could never be wrong; and besides, the pre- established harmony is the finest thing in the world, and so is his plenum and materia subtilis."- "Candide", Voltaire Commentator: Philip Littell.