i·som·er·ism

(ī-sŏm′ə-rĭz′əm)

1. The phenomenon of the existence of isomers.

2. The complex of chemical and physical phenomena characteristic of or attributable to isomers.

3. The state or condition of being an isomer.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

isomerism

(aɪˈsɒməˌrɪzəm)

1. (Chemistry) the existence of two or more compounds having the same molecular formula but a different arrangement of atoms within the molecule. See also stereoisomerism, optical isomerism

2. (General Physics) the existence of two or more nuclides having the same atomic numbers and mass numbers but different energy states

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

i•som•er•ism

(aɪˈsɒm əˌrɪz əm)

n.

1. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural or spatial arrangement.

2. the relation of two or more nuclides that have the same atomic number and mass number but different energy levels and half-lives.

3. the state or condition of being isomerous.

[1830–40]

i•so•mer•ic (ˌaɪ səˈmɛr ɪk) adj.

i`so•mer′i•cal•ly, adv.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

isomerism - the state of being an isomer; the complex of chemical and physical phenomena characteristic of isomers

state - the way something is with respect to its main attributes; "the current state of knowledge"; "his state of health"; "in a weak financial state"

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References in periodicals archive

connection not included above (i.e., crisscross heart, isomerism, heterotaxy syndromes, ventricular inversion),

Pattern of un-operated Grown Up Congenital Heart (GUCH) patients presenting to a Tertiary Care Cardiac Institute of Punjab

The most common congenital diseases associated with complete AVB include atrioventricular septal defect (isolated or associated with left atrial isomerism) and corrected congenital transposition of the great arteries.

Syncope due to complete atrioventricular block and treatment with a transient pacemaker in acute rheumatic fever

An echocardiogram was performed, and revealed the presence of left atrial isomerism (common atrium, interrupted inferior vena cava and bilateral left atrial appendages).

The peripartum management of a 32-year-old patient presenting at 34 weeks' gestation with unrepaired cyanotic heart disease

According to Garrison [11], 30% of registered pesticides indicate sort of spatial isomerism. Among them, pyrethroids should be highlighted.

Pyrethroid Stereoisomerism: Diastereomeric and Enantiomeric Selectivity in Environmental Matrices--A Review

Li, "Nature of isomerism in exotic sulfur isotopes," Physical Review Letters, vol.

[[eta].sub.Q] Meson Photoproduction in Ultrarelativistic Heavy Ion Collisions

Kostic, "Effects of linkage isomerism and of acid-base equilibria on reactivity and catalytic turnover in hydrolytic cleavage of histidyl peptides coordinated to palladium(II).

Hydrolysis of Methionine- and Histidine-Containing Peptides Promoted by Dinuclear Platinum(II) Complexes with Benzodiazines as Bridging Ligands: Influence of Ligand Structure on the Catalytic Ability of Platinum(II) Complexes

Koorsen et al., "The effect of geometrical isomerism of 3,5-dicaffeoylquinic acid on its binding affinity to HIV-integrase enzyme: a molecular docking study," Evidence-Based Complementary and Alternative Medicine, vol.

Revising Reverse-Phase Chromatographic Behavior for Efficient Differentiation of Both Positional and Geometrical Isomers of Dicaffeoylquinic Acids

Matsuhisa, "Sutureless pericardial repair of total anomalous pulmonary venous connection in patients with right atrial isomerism," Interactive Cardio Vascular and Thoracic Surgery, vol.

Pulmonary Hemodynamic Changes with Nitric Oxide or Oxygen in a Patient with Asplenia, Single Right Ventricle, and Total Anomalous Pulmonary Venous Connection after Fontan Procedure

Wadekar, "Effect of Ring Isomerism on Spectral and Antimicrobial Studies of Sm (III) Juglonates," IOSR Journal of Applied Chemistry, vol.

The Substitution Effect on Reaction Enthalpies of Antioxidant Mechanisms of Juglone and Its Derivatives in Gas and Solution Phase: DFT Study

Pathogenesis mutations in specific RP genes such as retinol binding and 3',5'-cyclic-GMP phosphodiesterase activity would evidently interfere with rod dysfunction or structural isomerism and give rise to congenital night blindness.

A Brief Review on the Pathological Role of Decreased Blood Flow Affected in Retinitis Pigmentosa

But her parents have been warned Honey-Rose may not reach adulthood as she also has atrial isomerism - abnormal atria - and pulmonary atresia, meaning the pulmonary valve did not form properly.

One year ago we were told Honey-Rose would die we never thought we'd have her home at Xmas; Mum's joy after tot has life-saving op

Although the operation was successful, Honey-Rose's health problems include right atrial isomerism and pulmonary atresia.

Baby sent to a hospice to die last Boxing Day defied medics is now home to enjoy Christmas; Kayley Newbold, 31, and Gary Clark, 34, were told Honey-Rose might only have hours to live after she was diagnosed with a life-threatening condition in the womb