Is 'equilibrium' English, or is it actually Latin?

'Equilibrium' is a word borrowed from Latin 'equilibrium'. The word entered the English language some time around 1608.

equilibrium [noun] [1608]

• a state of intellectual or emotional balance
• poise
• a state of adjustment between opposing or divergent influences or elements
• a state of balance between opposing forces or actions that is either static (as in a body acted on by forces whose resu...
• balance

See 'equilibrium' on the Loan Words Map

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Etymology: Latin 'aequilibrium' from 'aequilibris' being in equilibrium, from 'aequi-' + 'libra' weight, balance

See more loan words from 1600s.