Mosaic
An individual or tissue containing two or more types of genetically different cells. All females are mosaics because of X-chromosome inactivation (lyonization). Mosaic patterns can affect how genetic disorders are expressed. For example, about 5 percent of people with Down's syndrome have a mosaic variant, where only some cells have an extra chromosome 21. These individuals have fewer clinical symptoms, are more likely to have a normal IQ, and are less likely to have heart and other problems that can be associated with Down syndrome.
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1. Inlaid; resembling inlaid work. 2. The juxtaposition in an organism of genetically different tissues; it may occur normally (as in lyonization, q.v.), or pathologically, as an occasional phenomenon. From somatic mutation (gene mosaicism), an anomaly of chromosome division resulting in two or more types of cells containing different numbers of chromosomes (chromosome mosaicism), or chimerism (cellular mosaicism). [Mod. L. mosaicus, musaicus, pertaining to the Muses, artistic]

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mo·sa·ic mō-'zā-ik n an organism or one of its parts composed of cells of more than one genotype: CHIMERA
mosaic adj
1) exhibiting mosaicism
2) DETERMINATE
mo·sa·i·cal·ly -'zā-ə-k(ə-)lē adv

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mo·sa·ic (mo-zaґik) [Gr. mouseion, from mousa, Muse] 1. a pattern made of numerous small pieces fitted together. 2. in genetics, an individual composed of two or more cell lines that are karyotypically or genotypically distinct but are derived from a single zygote. Cf. chimera. 3. in embryology, the condition in the fertilized eggs of some species, such as the sea urchin, whereby the cells of early stages have developed cytoplasm which determines the parts that are to develop. 4. in plant pathology, a viral disease characterized by mottling of the foliage.

Medical dictionary. 2011.

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  • Mosaic-CK — Stable release 2.7ck9 / July 11, 2010; 16 months ago (2010 07 11) Operating system Mac OS X, Linux Type Web browser …   Wikipedia

  • Mosaic — Mo*sa ic, n. [F. mosa[ i]que; cf. Pr. mozaic, musec, Sp. & Pg. mosaico, It. mosaico, musaico, LGr. ?, ?, L. musivum; all fr. Gr. ? belonging to the Muses. See {Muse} the goddess.] 1. (Fine Arts) A surface decoration made by inlaying in patterns… …   The Collaborative International Dictionary of English

  • Mosaic — Mosaic,   der erste Internet Browser für grafische Benutzeroberflächen, der 1993 von Marc Andreesen, damals noch am National Center for Supercomputing Applications (Abk. NCSA), programmiert wurde. In den etwa drei Jahren zwischen der Entwicklung… …   Universal-Lexikon

  • Mosaic — Mo*sa ic, a. Of or pertaining to the style of work called mosaic; formed by uniting pieces of different colors; variegated; tessellated; also, composed of various materials or ingredients. [1913 Webster] A very beautiful mosaic pavement. Addison …   The Collaborative International Dictionary of English

  • Mosaic — (englisch für „Mosaik“) steht für: Mosaic Records, amerikanisches Jazz Musiklabel von Charlie Lourie und Michael Cuscuna für Jazz Reissues, 1982 gegründet Mosaic (Album), ein Album der Jazz Messengers (1961) Mosaik (Zeitschrift), ist der Name von …   Deutsch Wikipedia

  • Mosaic — fue el segundo navegador gráfico disponible para visualizar páginas web (el considerado como primer navegador gráfico es ViolaWWW, cuya primera versión completa data de 1992), y el primer navegador gráfico para Microsoft Windows. Fue creado en el …   Wikipedia Español

  • mosaic — [mō zā′ik] n. [LME musycke < OFr musique < ML musaicum, altered < LL musivum, mosaic, orig. neut. of L musivus, artistic, of a muse < L musa,MUSE: sp. altered by assoc. with Fr mosaïque < It mosaico < same ML source] 1. the… …   English World dictionary

  • MOSAIC — may refer to: *MOSAIC Research Group *MOSAIC Threat Assessment Systems *MOSAIC (housing cooperative) *Maui Optical System and Integration Center *Model of Syntax Acquisition in Children, an instance of CHREST …   Wikipedia

  • mosaic — (n.) c.1400, from O.Fr. mosaicq mosaic work, from It. mosaico, from M.L. musaicum mosaic work, work of the Muses, noun use of neuter of musaicus of the Muses, from L. Musa (see MUSE (Cf. muse)). Medieval mosaics were often dedicated to the Muses …   Etymology dictionary

  • Mosaic — Mo*sa ic, prop. a. [From Moses.] Of or pertaining to Moses, the leader of the Israelites, or established through his agency; as, the Mosaic law, rites, or institutions. [1913 Webster] …   The Collaborative International Dictionary of English

  • mosaic — index composite, compound, miscellaneous Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

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