Aequilibrium, æquilibrij. Euen weight and poyfe: sometime the tongue of the balance.Esse in æquilibrio.To be euen in balance.Æquilibrium membri. Per meraphoram. Gell. Nam cui membrum ab alio ruptum est, si ipsi itidem rumpere per talionem velit, quæro an efficere possit rumpendi pariter membri æquilibrium Like for like.Aequílibris & hoc æquilibre, pen. cor. Of the same weight.Margines struantur æquilibres ei plauitie. Vitruuius. Of equall height.
Lewis and Short: Latin dictionary
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.—II.Trop., a perfect equality: rumpendi pariter membri, Gell. 20, 1.