aerostatics

noun

aero·​stat·​ics ˌer-ō-ˈsta-tiks 

plural in form but singular or plural in construction

: a branch of statics that deals with the equilibrium of gaseous fluids and of solid bodies immersed in them

Word History

Etymology

aerostatic "of aerostatics, pneumatic" (borrowed from New Latin aërostaticus, from aëro- aero- + -staticus, in hydrostaticus hydrostatic) + -ics

First Known Use

1784, in the meaning defined above