| AA | 1) Aortic Arch(= Arcus Aortae)(= AA); ´ëµ¿¸Æ±Ã 2) Aplastic Anemia - Anemia |
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| AA | abdominal aorta; acetic acid; achievement age; active alcoholic; active assistive [range of motion];... |
| AAS | Aarskog-Scott [syndrome]; acid aspiration syndrome; alcoholic abstinence syndrome; American Academy ... |
| AB-SAAP | autologous blood selective aortic arch perfusion |
| ALW | arch-loop whorl |
| IAA | Interrupted aortic arch |
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| IAA | Interruption of the aortic arch |
| chi 2 | Chi square |
| LMS | Least Mean Square |
| MSE | Mean Square Error |
| chi-square | A statistical technique whereby variables are categorised to determine whether a distribution of scores is due to chance or experimental factors. (05 Mar 2000) |
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| chi-square distribution | A distribution in which a variable is distributed like the sum of the the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another. (12 Dec 1998) |
| chi-square test | A statistical method of assessing the significance of a difference, as when the data from two or more samples is represented by a discrete number such as the numbers of females and males attending each of two colleges. Synonym: x2 test. (05 Mar 2000) |
| square | 1. <geometry> The corner, or angle, of a figure. A parallelogram having four equal sides and four right angles. 2. Hence, anything which is square, or nearly so; as: A square piece or fragment. "He bolted his food down his capacious throat in squares of three inches." (Sir W. Scott) A pane of glass. One hundred superficial feet. 3. An area of four sides, generally with houses on each side; sometimes, a solid block of houses; also, an open place or area for public use, as at the meeting or intersection of two or more streets. "The statue of Alexander VII. Stands in the large square of the town." (Addison) 4. <mechanics> An instrument having at least one right angle and two or more straight edges, used to lay out or test square work. It is of several forms, as the T square, the carpenter's square, the try-square, etc. 5. Hence, a pattern or rule. 6. <mathematics> The product of a number or quantity multiplied by itself; thus, 64 is the square of 8, for 8 <times/ 8 = 64; the square of a + b is a^2 + 2ab + b^2. 7. Exact proportion; justness of workmanship and conduct; regularity; rule. "They of Galatia [were] much more out of square." (Hooker) "I have not kept my square." (Shak) 8. A body of troops formed in a square, especially. One formed to resist a charge of cavalry; a squadron. "The brave squares of war." 9. The relation of harmony, or exact agreement; equality; level. "We live not on the square with such as these." (Dryden) 10. <astronomy> The position of planets distant ninety degrees from each other; a quadrate. 11. The act of squaring, or quarreling; a quarrel. 12. The front of a woman's dress over the bosom, usually worked or embroidered. Geometrical square. See Quadrat. Hollow square, a formation of troops in the shape of a square, each side consisting of four or five ranks, and the colours, officers, horses, etc, occupying the middle. Least square, Magic square, etc. See Least, Magic, etc. On the square, or Upon the square, in an open, fair manner; honestly, or upon honor. On, or Upon, the square with, upon equality with; even with. To be all squares, to be all settled. To be at square, to be in a state of quarreling. To break no square, to give no offense; to make no difference. To break squares, to depart from an accustomed order. To see how the squares go, to see how the game proceeds; a phrase taken from the game of chess, the chessboard being formed with squares. Origin: OF. Esquarre, esquierre, F. Equerre a carpenter's square (cf. It. Squadra), fr. (assumed) LL. Exquadrare to make square; L. Ex + quadrus a square, fr. Quattuor four. See Four, and cf. Quadrant, Squad, Squer a square. 1. <geometry> Having four equal sides and four right angles; as, a square figure. 2. Forming a right angle; as, a square corner. 3. Having a shape broad for the height, with rectilineal and angular rather than curving outlines; as, a man of a square frame. 4. Exactly suitable or correspondent; true; just. "She's a most truimphant lady, if report be square to her." (Shak) 5. Rendering equal justice; exact; fair; honest, as square dealing. 6. Even; leaving no balance; as, to make or leave the accounts square. 7. Leaving nothing; hearty; vigorous. "By Heaven, square eaters. More meat, I say." (Beau. & Fl) 8. at right angles with the mast or the keel, and parallel to the horizon; said of the yards of a square-rigged vessel when they are so braced. Square is often used in self-explaining compounds or combination, as in square-built, square-cornered, square-cut, square-nosed, etc. Square foot, an area equal to that of a square the sides of which are twelwe inches; 144 square inches. Square knot, a knot in which the terminal and standing parts are parallel to each other; a reef knot. Square measure, the measure of a superficies or surface which depends on the length and breadth taken conjointly. The units of square measure are squares whose sides are the linear measures; as, square inches, square feet, square meters, etc. Square number. See square. <mathematics> Square root of a number or quantity, a stern having a transom and joining the counter timbers at an angle, as distinguished from a round stern, which has no transom. Three-square, Five-square, etc, having three, five, etc, equal sides; as, a three-square file. To get square with, to get even with; to pay off. 1. To form with four sides and four right angles. 2. To form with right angles and straight lines, or flat surfaces; as, to square mason's work. 3. To compare with, or reduce to, any given measure or standard. 4. To adjust; to regulate; to mold; to shape; to fit; as, to square our actions by the opinions of others. "Square my trial To my proportioned strength." (Milton) 5. To make even, so as leave no remainder of difference; to balance; as, to square accounts. 6. <mathematics> To multiply by itself; as, to square a number or a quantity. 7. <astronomy> To hold a quartile position respecting. "The icy Goat and Crab that square the Scales." (Creech) 8. To place at right angles with the keel; as, to square the yards. To square one's shoulders, to raise the shoulders so as to give them a square appearance, a movement expressing contempt or dislike. <mathematics> To square the circle, to determine the exact contents of a circle in square measure. The solution of this famous problem is now generally admitted to be impossible. Origin: Cf. OF. Escarrer, esquarrer. See Square. Source: Websters Dictionary (01 Mar 1998) |
| square matrix | A matrix in which the numbers of rows and columns are equal. (05 Mar 2000) |
| square wave stimuli | Electrical stimulation in which the intensity of the current is brought suddenly to a given level and maintained at that level until it suddenly is cut off; this type of stimulus is particularly useful in obtaining a strength-duration curve. (05 Mar 2000) |
| inverse square law | As applied to point sources, the intensity of radiation diminishes in proportion to the square of the distance from the source. (05 Mar 2000) |
| Latin square | A statistical design for experiments that removes from experimental error the variation from two sources that may be identified with the rows and columns of a square. The allocation of experimental treatments is such that each treatment occurs exactly once in each row and column. For example, a design for a 5 × 5 square is as follows: (05 Mar 2000) |
| abdominothoracic arch | A bell-shaped line defined by the lower end of the sternum and the costal arches on each side, constituting a boundary line between the anterolateral portions of the thoracic and abdominal walls. (05 Mar 2000) |
| alveolar arch of mandible | The free margin of the alveolar process of the mandible. Synonym: arcus alveolaris mandibulae, limbus alveolaris. (05 Mar 2000) |
| alveolar arch of maxilla | The free border of the alveolar process of the maxilla. Synonym: arcus alveolaris maxillae, limbus alveolaris. (05 Mar 2000) |
| anterior arch of atlas | An arch that connects the lateral masses of the atlas anteriorly and articulates with the anterior articular facet of the dens of the axis. Synonym: arcus anterior atlantis. (05 Mar 2000) |
| anterior palatine arch | One of a pair of ridges or folds of mucous membrane passing from the soft palate to the side of the tongue; it encloses the palatoglossus muscle and forms anterior margin of the tonsillar fossa. Also demarcates oral cavity from isthmus of fauces. Synonym: arcus palatoglossus, anterior palatine arch, anterior pillar of fauces, arcus glossopalatinus, glossopalatine arch, glossopalatine fold. (05 Mar 2000) |
| aortic arch | The curved portion between the ascending and descending parts of the aorta; it begins as a continuation of the ascending aorta posterior to the sternal angle, runs posteriorly and slightly to the left as it passes over the root of the left lung, and becomes the descending aorta as it reaches and begins to course along the vertebral column; it gives rise to the brachiocephalic trunk, the left common carotid and left subclavian arteries. Any member of the several pairs of arterial channels encircling the embryonic pharynx in the mesenchyme of the brachial arches; there are potentially six pairs, but in mammals the fifth pair is poorly developed or absent. The first and second pairs are functional only in very young embryos; the third pair is involved in the formation of the carotids; the fourth arch on the left is incorporated in the arch of the aorta; the sixth pair forms the proximal part of the pulmonary arteries. A series of arterial channels encircling the embryonic pharynx in the mesenchyme of the branchial arch's. There are potentially six pairs, but in mammals the fifth pair is poorly developed or absent. The first and second pairs are functional only in very young embryos; the third pair is involved in the formation of the carotids; the fourth arch on the left is incorporated in the arch of the aorta; the sixth pair forms the proximal part of the pulmonary arteries. Synonym: arcus aortae. (05 Mar 2000) |
| aortic arch syndrome | <syndrome> Aortic arch syndrome, also referred to by many as vertebral-basilar artery disease, carotid artery occlusive syndrome and subclavian steal syndrome is characterised by a constellation of signs and symptoms which occur secondary to abnormalities in the major arteries which extend off of the aortic arch. These abnormalities are structural and most often secondary to the effects of atherosclerosis, blood clots, trauma or a congenital abnormality. Symptoms of this condition include various neurologic symptoms, reduction in pulse and changes in blood pressure. (27 Sep 1997) |
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