aero·me·chan·ics \| ̷ ̷( ̷ ̷) ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷\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