Meaning of ISOMERISM
| Pronunciation: | | I'sâmu`rizum
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 WordNet Dictionary |
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| | Definition: | | [n] the state of being an isomer; the complex of chemical and physical phenomena characteristic of isomers |
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| | See Also: | | state | |
| Webster's 1913 Dictionary |
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| | Definition: | | \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 l[ae]vo-tartaric
acids. In such compounds there is usually at least one
unsymmetrical carbon atom. See {Unsymmetrical}.
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| Biology Dictionary |
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| | Definition: | | A condition in which several chemical compounds have the same molecular formula (have the same number and type of atoms) but, because those atoms are arranged differently in each, they all have different chemical properties. |
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