equilibration

n. 1. Act of keeping a balance, or state of being balanced; equipoise. [ 1913 Webster ]

In . . . running, leaping, and dancing, nature's laws of equilibration are observed. J. Denham. [ 1913 Webster ]

2. (Biol.) The process by which animal and vegetable organisms preserve a physiological balance. H. Spenser. [ 1913 Webster ]