What does EQUIL stand for?

Equilibrium

A dynamic condition of balance between atomic movements, where the resultant is zero and the condition appears to be one of rest rather than change.  State of balance between opposing forces or effects. When the reactants and products are in a constant ratio. The forward reaction and the reverse reactions occur at the same rate when a system is in equilibrium. A system in which the rates of the forward and the reverse reaction are equal.