| monochromatic | <microscopy> All objects in a group (electrons, light, X-rays etc.) have the same energy or wavelength. (05 Aug 1998) |
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| 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) |
| monochromatophil | Monochromatophile 1. Taking only one stain. 2. A cell or any histologic element staining with only one kind of dye. Synonym: monochromophil, monochromophile. Origin: mono-+ G. Chroma, colour, + philos, fond (05 Mar 2000) |
| monochromator | <microscopy> A light-dispersing instrument which is used to obtain light of substantially one wavelength, or at least of a very narrow band of the spectrum. The light is apt to be weak because of its purity. The use of monochromatic light filters is usually adequate for microscopical work. (05 Aug 1998) |