Pneū-māt'ics, n. sing.

n. sing. [See supra. Fr. pneumatique, It. pneumatica, Sp. neumatica, pneumatica.] [See Note under MATHEMATICS.]

1. That branch of science which treats of the mechanical properties of air and other elastic fluids, as of their weight, pressure, elasticity, and the like.
2. (Philos. & Theol.) The doctrine of spiritual substances, as God, angels, and the souls of men; pneumatology. [Obs.]