Bible Dictionaries
Pneumatics

Webster's Dictionary

(1):

(n.) The scientific study or knowledge of spiritual beings and their relations to God, angels, and men.

(2):

(n.) That branch of science which treats of the mechanical properties of air and other elastic fluids, as of their weight, pressure, elasticity, etc. See Mechanics.

Bibliography Information
Webster, Noah. Entry for 'Pneumatics'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/pneumatics.html. 1828.