| monochord | An instrument for experimenting upon the mathematical relations of musical sounds. It consists of a single string stretched between two bridges, one or both of which are movable, and which stand upon a graduated rule for the purpose of readily changing and measuring the length of the part of the string between them. Origin: L. Monochordon, Gr, fr. With but one string; only, single + string: cf. F. Monocorde. See Chord, and cf. Mainchord. Source: Websters Dictionary (01 Mar 1998) |
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| monochorea | Chorea affecting the head alone or only one extremity. (05 Mar 2000) |
| monochorial | Relating to or having a single chorion; denoting monovular twins. Synonym: monochorial. (05 Mar 2000) |
| monochorial twins | Identical twins, twins which are the result of a single zygote (fertilized egg) splitting into two cell masses and becoming two individuals. The twins are genetically identical and are always of the same sex (both males or both females). Compare: dizygotic twins. (09 Oct 1997) |
| monochorionic | Relating to or having a single chorion; denoting monovular twins. Synonym: monochorial. (05 Mar 2000) |
| monochorionic diamniotic placenta | The placenta(s) of a twin pregnancy; if dizygotic, the placenta's may be separate or fused, the latter retaining two amniotic and two chorionic sacs (dichorionic diamniotic placenta); if monozygotic, the placenta may be a (05 Mar 2000) |
| monochorionic monoamniotic placenta | Depending on the stage at which twinning took place; if twinning occurs early, there may be a fused placenta with two chorionic and two amniotic membranes. Alternative form: monochorionic diamniotic placenta (05 Mar 2000) |
| monochroic | <microscopy> All objects in a group (electrons, light, X-rays etc.) have the same energy or wavelength. (05 Aug 1998) |
| monochromasia | A severe congenital deficiency in colour perception, often associated with nystagmus and reduced visual acuity. Synonym: achromatic vision, monochromasia, monochromasy, monochromatism. Origin: G. A-priv. + chroma, colour, + opsis, vision (05 Mar 2000) |
| monochromasy | A severe congenital deficiency in colour perception, often associated with nystagmus and reduced visual acuity. Synonym: achromatic vision, monochromasia, monochromasy, monochromatism. Origin: G. A-priv. + chroma, colour, + opsis, vision (05 Mar 2000) |
| monochromatic | <microscopy> All objects in a group (electrons, light, X-rays etc.) have the same energy or wavelength. (05 Aug 1998) |
| monochromatic aberration | A defect in an optical image arising because of the nature of lenses; the main types are spherical, coma, curvature, and distortion aberration, and astigmatism of oblique pencils. (05 Mar 2000) |
| monochromatic light | <microscopy> Light composed of one wavelength. It may be obtained by the use of a laser or by gaseous discharge tubes in combination with proper filters. An approximation is obtained by interference filters or monochromators. (05 Aug 1998) |
| monochromatic rays | Light ray's or ionizing radiation of a very narrow band of wavelengths (ideally, of a single wavelength). Compare: photopeak, characteristic radiation. (05 Mar 2000) |
| monochromatism | 1. The state of having or exhibiting only one colour. Synonym: achromatopsia. Origin: mono-+ G. Chroma, colour (05 Mar 2000) |
| monatomic |
of or relating to an element consisting of a single atom; "helium and argon are monatomic gases"
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| monaural |
relating to or having or hearing with only one ear; "monaural deafness"
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| Monera |
prokaryotic bacteria and blue-green algae and various primitive pathogens; because of lack of consensus on how to divide the organisms into phyla informal names are used for the major divisions
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| monestrous |
having one estrous cycle per year
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| mongolism |
a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
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| MON | an Asian race |
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| MON | agile grizzled Old World viverrine |
| MON | an inferior dog or one of mixed breed |
| MON | derogatory term for a variation that is not genuine |
| MON | of inferior or mixed breed |
| MON | cause to become a mongrel |
| MON | cause to become a mongrel |
| MON | a polynomial in one variable |
| MON | United States tennis player (born in Yugoslavia in 1973) |
| MON | based on or arising from the possession of money or wealth |
| MON | a familiar name (often a shortened version of a person's given name) |
| MON | any of the yeastlike imperfect fungi of the genus Monilia |