| banding pattern | <genetics> Chromosomes stained with certain dyes, commonly quinacrine (Q banding) or Giemsa (G banding), show a pattern of transverse bands of light and heavy staining that is characteristic for the individual chromosome. The basis of the differential staining, which is the same in most tissues, is not understood: each band represents 5-10% of the length, about 10exp7 base pairs, although this is not true for polytene chromosomes in Drosophila that show more than 4000 bands. (18 Nov 1997) |
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| butterfly pattern | Bilateral, symmetric, pulmonary alveolar opacities sparing the periphery, on chest radiographs; usually caused by pulmonary oedema. (05 Mar 2000) |
| male pattern alopecia | The most common form of androgenic alopecia, seen in men as receding frontal and bilateral triangular temple hair lines, and a balding patch on the vertex, which may progress to complete alopecia. Synonym: male pattern baldness. (05 Mar 2000) |
| male pattern baldness | The most common form of androgenic alopecia, seen in men as receding frontal and bilateral triangular temple hair lines, and a balding patch on the vertex, which may progress to complete alopecia. Synonym: male pattern baldness. (05 Mar 2000) |
| random pattern flap | A flap in which the pedicle blood supply is derived randomly from the network of vessels in the area, rather than from a single longitudinal artery as in an axial pattern flap. (05 Mar 2000) |
| pattern | 1. Anything proposed for imitation; an archetype; an exemplar; that which is to be, or is worthy to be, copied or imitated; as, a pattern of a machine. "I will be the pattern of all patience." (Shak) 2. A part showing the figure or quality of the whole; a specimen; a sample; an example; an instance. "He compares the pattern with the whole piece." (Swift) 3. Stuff sufficient for a garment; as, a dress pattern. 4. Figure or style of decoration; design; as, wall paper of a beautiful pattern. 5. Something made after a model; a copy. "The patterns of things in the heavens." (Heb. Ix. 23) 6. Anything cut or formed to serve as a guide to cutting or forming objects; as, a dressmaker's pattern. 7. A full-sized model around which a mold of sand is made, to receive the melted metal. It is usually made of wood and in several parts, so as to be removed from the mold without injuring it. A definable characteristic relationship between the members of any set of objects or actions; also, the set having a definable relationship between its members. Thus: the distribution of bomb or shell impacts on a target area, or of bullet holes in a target; a set of traits or actions that appear to be consistent throughout the members of a group or over time within a group, as behavioral pattern, traffic pattern, dress pattern Pattern box, chain, or cylinder, devices, in a loom, for presenting several shuttles to the picker in the proper succession for forming the figure. Pattern card. A set of samples on a card. A count-wheel. Origin: OE. Patron, F. Patron, a patron, also, a pattern. See Patron. Source: Websters Dictionary (01 Mar 1998) |
| pattern formation | <cell biology> One of the classic problems in developmental biology is the way in which complex patterns are formed from an apparently uniform field of cells. Various hypotheses have been put forward and there is now evidence for the existence of gradients of diffusible substances (morphogens) specifying the differentiative pathway that should be followed according to the concentration of the morphogen around the cell. (18 Nov 1997) |
| pattern recognition | In information retrieval, machine-sensing or identification of visible patterns (shapes, forms, and configurations). (harrod's librarians' glossary, 7th ed) (12 Dec 1998) |
| pattern recognition, visual | Visually perceived characters, shapes, displays, or designs. (12 Dec 1998) |
| pattern sensitive epilepsy | A form of reflex epilepsy precipitated by viewing certain patterns. (05 Mar 2000) |
| reticulonodular pattern | A somewhat net-like chest radiographic pattern, with nodular thickening at the intersections of the lines; a non-specific interstitial pattern. (05 Mar 2000) |
| reverse pulmonary oedema pattern | <radiology> Loeffler pneumonia, chronic eosinophilic pneumonia (12 Dec 1998) |
| ground-glass pattern | Radiographic or CT appearance of hazy opacity which fails to obscure pulmonary vascular markings. (05 Mar 2000) |
| RNA splicing pattern | <molecular biology> The combination of DNA sequences copied from a gene by messenger RNA. The mRNAs transcribed from a single gene may splice together different parts of the sequence of the gene. (23 Aug 1998) |
| miliary pattern | A chest radiographic pattern of fine, rounded opacities, typical of haematogenous dissemination of tuberculosis; size has some relationship to that of a millet seed. (05 Mar 2000) |