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