| ̷ ̷( ̷ ̷) ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ noun plural but singular in construction
Etymology: aer- + mechanics
: the branch of mechanics that deals with the equilibrium and motion of gases and of solid bodies immersed in them — compare aerodynamics , aerostatics , pneumatics