A / aequĭlībrĭum
noun

aequĭlībrĭum

gen. aequĭlībrii · gender neuter · decl. 2nd
aequilibris
a level; horizontal position
a level or horizontal position, equilibrium: quaedam ligna ad medium submersa ad aequilibrium aquae, Sen. Q. N. 3, 25; so Col. Arb. 5, 2.—
a perfect equality figuratively
Trop., a perfect equality: rumpendi pariter membri, Gell. 20, 1.