aequĭlībrĭum
aequĭlībrĭum, ii, n. aequilibris, a level or horizontal position, equilibrium: quaedam ligna ad medium submersa ad aequilibrium aquae, Sen. Q. N. 3, 25; so Col. Arb. 5, 2.— Trop., a perfect equality: rumpendi pariter membri, Gell. 20, 1.