isomeric

isomeric
isomeric i`so*mer"ic ([imac]`s[-o]*m[e^]r"[i^]k), a. [Iso- + Gr. me`ros part: cf. F. isom['e]rique.] (Chem.) Having the same chemical composition and molecular weight; having the same number of atoms of each kind in the molecule; -- said of chemical compounds with known chemical composition. This property used to be called {metameric} to distinguish it from other forms of isomerism. [PJC]

Note: Formerly the term isomeric applied also to comopounds having the same percentage chemical composition, even if the number of atoms in a molecule differed. In the 1913 dictionary isomeric was defined as: ``Having the same percentage composition; -- said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.: (a) Polymeric; i. e., having the same elements united in the same proportion by weight, but with different molecular weights; as, acetylene and benzine are isomeric (polymeric) with each other in this sense. See {Polymeric}. (b) Metameric; i. e., having the same elements united in the same proportions by weight, and with the same molecular weight, but with a different structure or arrangement of the ultimate parts; as, ethyl alcohol and methyl ether are isomeric (metameric) with each other in this sense. See {Metameric}.'' [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • isomeric — ISOMÉRIC, Ă adj. v. izomeric. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • isomeric — isomer ► NOUN 1) Chemistry each of two or more compounds with the same formula but a different arrangement of atoms and different properties. 2) Physics each of two or more atomic nuclei with the same atomic number and mass number but different… …   English terms dictionary

  • Isomeric transition — is a radioactive decay process that occurs in an atom where the nucleus is in an excited meta state (e.g. following the emission of an alpha or beta particle). The extra energy in the nucleus is released by the emission of a gamma ray, returning… …   Wikipedia

  • isomeric branching — izomerinis šakojimasis statusas T sritis fizika atitikmenys: angl. isomeric branching vok. isomerische Aufzweigung, f rus. изомерное разветвление, n pranc. branchement isomérique, m …   Fizikos terminų žodynas

  • isomeric nucleus — izomerinis branduolys statusas T sritis fizika atitikmenys: angl. isomeric nucleus vok. isomerer Kern, m rus. изомерное ядро, n pranc. noyau isomère, m …   Fizikos terminų žodynas

  • isomeric state — izomerinė būsena statusas T sritis fizika atitikmenys: angl. isomeric state vok. isomerer Zustand, m rus. изомерное состояние, n pranc. état isomère, m …   Fizikos terminų žodynas

  • isomeric — adjective Etymology: German isomerisch, from Greek isomerēs equally divided, from is + meros part more at merit Date: 1833 of, relating to, or exhibiting isomerism …   New Collegiate Dictionary

  • isomeric — adj. [Gr. isos, equal; meros, part] Equivalent genes which can each produce the same phenotype …   Dictionary of invertebrate zoology

  • isomeric — isomerically, adv. /uy seuh mer ik/, adj. of, pertaining to, or displaying isomerism. [1830 40; < Gk isomer(és) having equal parts (see ISO , MERE) + IC] * * * …   Universalium

  • isomeric — adjective a) Being an isomer. b) Exhibiting isomerism …   Wiktionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”