- equal in quantity, value, force, meaning, etc.
- Chem. having the same valence
- Geom. equal in area, volume, etc., but not of the same shape
Origin of equivalentMiddle English from Old French from Late Latin aequivalens, present participle of aequivalere, to have equal power: see equi- and value
- an equivalent thing
- the quantity by weight (of a substance) that combines with 8 grams of oxygen or 1.008 grams of hydrogen
- the weight obtained by dividing the atomic weight by the valence