| E(X) | expected value of the random variable X |
|---|---|
| MRF | Markov random field; medical record file; melanocyte-[stimulating hormone]-releasing factor; mesence... |
| RBS | random blood sugar; Roberts syndrome; Rutherford backscattering |
| RDB | random double-blind [trial] |
| RM | radical mastectomy; random migration; radon monitor; range of movement; red marrow; reference materi... |
| continuous random variable | Continuous variable that may randomly assume any value in its domain but any particular value has no probability of occurring, only a probability density. (05 Mar 2000) |
|---|---|
| sample, random | A group selected randomly, solely by chance. (12 Dec 1998) |
| pure random drift | That which has random components only with an average value of zero and no systematic effects. Brownian movement in a still container shows pure random drift but in the Mississippi shows a steady downstream tendency. (05 Mar 2000) |
| discrete random variable | A random variable that may assume a countable number of values, each with a probability strictly greater than zero. (05 Mar 2000) |
| ordered on-random off mechanism | A scheme for substrate binding and product release for multisubstrate enzymes; for a two-substrate two-product enzyme with this mechanism, the individuals have to bind to the enzyme in a distinct order; however, once the products are formed they may dissociate from the enzyme in either order. It has been suggested that pyruvate kinase has such a mechanism. The random on-ordered off mechanism is simply the reverse of this mechanism. (05 Mar 2000) |
| airspace-filling pattern | Cloudy to dense opacities, obscuring vascular markings, on chest radiographs. Synonym: airspace-filling pattern. (05 Mar 2000) |
| airway pattern | Chest radiographic appearance of thickened bronchial walls, bronchiectasis, bronchiolitis, or acinar consolidation. (05 Mar 2000) |
| alveolar pattern | Cloudy to dense opacities, obscuring vascular markings, on chest radiographs. Synonym: airspace-filling pattern. (05 Mar 2000) |
| A-pattern strabismus | Strabismus in which esotropia is more marked in looking upward than downward, strabismus in which exotropia is more marked on looking downward than upward. Synonym: A-pattern strabismus. (05 Mar 2000) |
| ballerina-foot pattern | A vigorous posteromedial contraction of the left ventricle coupled with convexity anteriorly sometimes resulting from poor contraction of the opposing anterior wall; it is the most frequent dyssynergy observed in the prolapsed mitral valve leaflet syndrome (even with a normal anterior wall) and produces a configuration of angiographic dye in the right anterior oblique projection resembling a ballerina's foot; sometimes called dancer's foot malformation. (05 Mar 2000) |
| 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) |
| 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) |
| 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) |