Definition of Isomirism
I*som"er*ism (?), n. (Chem.)
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. In such
compounds there is usually at least one unsymmetrical carbon atom.
See Unsymmetrical.
- Webster's Unabridged Dictionary (1913)
- (chemistry) the phenomenon of the existence of isomers - the existence of different substances with the same molecular formulae
- The Nuttall Encyclopedia
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