| each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in cis- and trans- configurations. |
| geometric isomer n. A chemical compound having the same molecular formula as another but a different geometric configuration, as when atoms or groups of atoms are attached in different spatial arrangements on either side of a bond or a ring. |
geometric isomer  (jē'ə-mět'rĭk) Pronunciation Key
Any of two or more stereoisomers that differ in the arrangement of atoms or groups of atoms around a structurally rigid bond, such as a double bond or a ring. Geometric isomers differ from one another in physical properties like melting and boiling points. Compare enantiomer. |