Two coloured materials are metamers, or form a metameric pair, when they match in colour, but the light they reflect differs in spectral composition. When this is so the surfaces will differ in colour under different incidental lighting. The existence of metamerism is a severe difficulty for theories trying to identify colour of surfaces with the physical nature of reflected light. Interestingly, there is no parallel phenomenon for sound, since sounds composed of different energy levels at different frequencies are heard differently.

Philosophy dictionary. . 2011.

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  • Metamerism — has at least three meanings: Metamerism (biology) is the property of having repeated segments, as in annelids; a concern of zoology and developmental biology The chemical property of having the same proportion of atomic components in different… …   Wikipedia

  • metamerism — metamerísm s. n. Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  METAMERÍSM s.n. Metamerie (2) [în DN]. [cf. fr. métamérie]. Trimis de LauraGellner, 13.09.2007. Sursa: DN  METAMERÍSM s. n. 1. metamerie (2). 2. ( …   Dicționar Român

  • Metamerism — Me*tam er*ism, n. 1. (Biol.) The symmetry of a metameric structure; serial symmetry; the state of being made up of metameres. [1913 Webster] 2. (Chem.) The state or quality of being metameric; isomerism due to different bonding patterns in two… …   The Collaborative International Dictionary of English

  • metamerism — metamerism. См. сегментация. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • metamerism — [mə tam′ər iz΄əm] n. 1. [ METAMER + ISM] Chem. the type of isomerism in which chemical compounds have identical proportions of the same elements and the same molecular weight, but have radicals differing in type or position, with resulting… …   English World dictionary

  • metamerism — 1. A type of anatomic structure exhibiting serially homologous metameres; in primitive forms, such as the annelids, the metameres are almost alike in structure; in vertebrates, specialization in the cephalic region masks the underlying m., which… …   Medical dictionary

  • metamerism — metamerija statusas T sritis chemija apibrėžtis Izomerija, atsirandanti dėl heteroatomo padėties kitimo alifatinėje grandinėje. atitikmenys: angl. metamerism rus. метамерия …   Chemijos terminų aiškinamasis žodynas

  • metamerism — noun Date: 1833 the condition of having or the stage of evolutionary development characterized by a body made up of metameres …   New Collegiate Dictionary

  • metamerism — the segmental repetition of parts …   Dictionary of ichthyology

  • metamerism — n. [Gr. meta, after; meros, part] Segmental repetition of homologous body parts; metameres; metasomes …   Dictionary of invertebrate zoology

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