isomerism
noun
Forms isomerisms
- noun (physical chemistry) the phenomenon of the existence of isomers - the existence of different substances with the same molecular formulae
- noun (chemistry) the interconversion of isomers
- noun (nuclear physics) nuclear isomerism, the phenomenon of the existence of nuclear isomers.
Webster’s 1913
- noun The state, quality, or relation, of two or more isomeric substances. Physical isomerism (Chem.), the condition or relation of certain (metameric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro-and lævo-tartaric acids.
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “isomerism”, CC BY-SA 4.0. Details