- equilibrium (n.)
[equilibrium 词源字典]
- c. 1600, "state of mental balance," from Latin aequilibrium "an even balance; a horizontal position," from aequilibris "equal, level, horizontal, evenly balanced," from aequus "equal" (see equal (adj.)) + libra "a balance, scale, plummet" (see Libra). Related: Equilibrious.[equilibrium etymology, equilibrium origin, 英语词源]