| globular heart | Abnormally smooth arcuate contours of the heart due either to disease of the ventricles or to a false cardiac appearance produced by excessive pericardial fluid. Synonym: globular heart. (05 Mar 2000) |
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| globular | Globe-shaped; having the form of a ball or sphere; spherical, or nearly so; as, globular atoms. Globular chart, a chart of the earth's surface constructed on the principles of the globular projection. <geometry> Globular projection, a perspective projection of the surface of a hemisphere upon a plane parallel to the base of the hemisphere, the point of sight being taken in the axis produced beyond the surface of the opposite hemisphere a distance equal to the radius of the sphere into the sine of 45 deg . Globular sailing, sailing on the arc of a great circle, or so as to make the shortest distance between two places; circular sailing. Origin: Cf. F. Globulaire. Source: Websters Dictionary (01 Mar 1998) |
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| globular actin | <protein> A short polypeptide chain of 375 amino acids which is the monomeric unit of the protein actin (one of the two proteins involved in muscle contraction). Many units of G actin join together in a polymer to make an actin filament. (09 Oct 1997) |
| globular leukocyte | A type of wandering cell with a small, round nucleus found in the epithelium and lamina propria of the intestinal mucosa of many animals; its cytoplasm contains large eosinophilic globules or droplets. (05 Mar 2000) |
| globular process | An obsolete term for intermaxillary segment. (05 Mar 2000) |
| globular protein | <molecular biology> Any protein that adopts a compact morphology is termed globular. Generally applied to proteins in free solution that have a more-or-less spherical shape, but may also be used for compact folded proteins within membranes. (14 Oct 1997) |
| globular sputum | A thick, coherent mass expectorated in globular shape which does not run at the bottom of the cup but forms a discoid mass resembling a coin. Synonym: globular sputum. (05 Mar 2000) |
| globular thrombus | One of a number of thrombi of varying size, from a pea to a walnut, within the heart cavity, connected by a delicate fibrinous network. (05 Mar 2000) |
| abnormal heart chamber dimensions | <radiology> Left ventricular volume overload, left ventricular hypertrophy, right ventricular volume overload, right ventricular hypertrophy, fixed subvalvular aortic stenosis, hypoplastic left/right ventricle; common ventricle, congestive cardiomyopathy (12 Dec 1998) |
| Abrams' heart reflex | A contraction of the myocardium when the skin of the precordial region is irritated. (05 Mar 2000) |
| american heart association | A voluntary organization concerned with the prevention and treatment of heart and vascular diseases. (12 Dec 1998) |
| apex of heart | The blunt extremity of the heart formed by the left ventricle. See: apex beat. Synonym: apex cordis, vertex cordis. (05 Mar 2000) |
| armored heart | Calcareous deposits in the pericardium due to subacute or chronic pericarditis. Synonym: panzerherz. (05 Mar 2000) |
| armor heart | Extensive to complete calcification (rarely ossification) of the pericardium usually producing constrictive pericarditis. (05 Mar 2000) |
| artificial heart | A mechanical pump used to replace the function of a damaged heart, either temporarily or as a permanent prosthesis. (05 Mar 2000) |
| artificial heart valve | <cardiology> A synthetic or porcine (pigskin) valve surgically placed into the heart to replace a defective or malfunctioning valve. The aortic and mitral valves are the most frequently replaced with artificial valves. (27 Sep 1997) |