the.com/equivalent

Equal in value, not identity — same weight, different shape.

means Having the same value, function, or effect as something else, even though it may look or be structured differently.

from From Late Latin 'aequivalens,' combining 'aequi-' (equal) and 'valens' (being strong or worth), the present participle of 'valere,' to be strong or have worth — the same root that gives us 'value' and 'valiant.' So an equivalent thing is, quite literally, one that carries equal weight or worth, even if it isn't the same thing at all.

math use
Same truth value, not same wording
chemistry use
Amount that reacts exactly, no leftovers
common trap
People use it to mean identical, wrongly
etymology
Latin aequivalere, literally to be worth equally
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