| cor pendulum | An extreme form of cor mobile in which the heart appears to be suspended by the great vessels. Synonym: pendulous heart. (05 Mar 2000) |
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| velum pendulum palati | The muscular part of the roof of the mouth. The soft palate is directly behind the hard palate. It lacks bone and so is soft. (12 Dec 1998) |
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| pendulum | Origin: NL, fr. L. Pendulus hanging, swinging. See Pendulous. A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery. The time of oscillation of a pendulum is independent of the arc of vibration, provided this arc be small. Ballistic pendulum. See Ballistic. Compensation pendulum, a clock pendulum in which the effect of changes of temperature of the length of the rod is so counteracted, usually by the opposite expansion of differene metals, that the distance of the center of oscillation from the center of suspension remains invariable; as, the mercurial compensation pendulum, in which the expansion of the rod is compensated by the opposite expansion of mercury in a jar constituting the bob; the gridiron pendulum, in which compensation is effected by the opposite expansion of sets of rodsof different metals. Compound pendulum, an ordinary pendulum; so called, as being made up of different parts, and contrasted with simple pendulum. Conical or Revolving, pendulum, a weight connected by a rod with a fixed point; and revolving in a horizontal cyrcle about the vertical from that point. Pendulum bob, the weight at the lower end of a pendulum. Pendulum level, a plumb level. See Level. Pendulum wheel, the balance of a watch. Simple or Theoretical, pendulum, an imaginary pendulum having no dimensions except length, and no weight except at the center of oscillation; in other words, a material point suspended by an ideal line. Source: Websters Dictionary (01 Mar 1998) |
| pendulum rhythm | A condition in which the cadence of the heart sounds resembles that of the foetus, the first and second sounds becoming alike and evenly spaced; a sign of serious myocardial disease. Synonym: pendulum rhythm, tic-tac rhythm, tic-tac sounds. Origin: embryo-+ G. Kardia, heart (05 Mar 2000) |
| cor | The muscular organ that maintains the circulation of the blood. C. Adiposum a heart that has undergone fatty degeneration or that has an accumulation of fat around it, also called fat or fatty, heart. C. Arteriosum the left side of the heart, so called because it contains oxygenated (arterial) blood. C. Biloculare a congenital anomaly characterised by failure of formation of the atrial and ventricular septums, the heart having only two chambers, a single atrium and a single ventricle and a common atrioventricular valve. C. Bovinum (L. Ox heart) a greatly enlarged heart due to a hypertrophied left ventricle, also called c. Taurinum and bucardia. C. Dextrum (L. Right heart) the right atrium and ventricle. C. Hirsutum, c. Villosum. C. Mobile (obs.) an abnormally movable heart. C. Pendulum a heart so movable that it seems to be hanging by the great blood vessels. C. Pseudotriloculare biatriatum a congenital cardiac anomaly in which the heart functions as a three chambered heart because of tricuspid atresia, the right ventricle being extremely small or rudimentary and the right atrium greatly dilated. Blood passes from the right to the left atrium and thence disease due to pulmonary hypertension secondary to disease of the lung or its blood vessels, with hypertrophy of the right ventricle. Origin: L. Cordis (18 Nov 1997) |
| cor adiposum | Fatty degeneration of the myocardium, accumulation of adipose tissue on the external surface of the heart with occasional infiltration of fat between the muscle bundles of the heart wall. Synonym: cor adiposum. (05 Mar 2000) |
| cor biloculare | A heart in which the interatrial and interventricular septa are absent or incomplete. (05 Mar 2000) |
| cor bovinum | <anatomy, cardiology, pathology> A very large heart usually due to chronic hypertension or, more often to aortic valve disease. Synonym: bucardia, cor bovinum. (05 Mar 2000) |
| cor mobile | A heart that moves unduly on change of bodily position. Synonym: movable heart. (05 Mar 2000) |
| cor pulmonale | Enlargement of the right ventricle in the face of pulmonary hypertension that may occur primarily or secondary to emphysema or bronchiectasis. Eventually the enlarged right ventricle weakens resulting in right-sided congestive heart failure. (27 Sep 1997) |
| cor triatriatum | <cardiology, embryology> A congenital anomaly characterised by the presence in the atrium of a perforated muscular membrane which separates the atrium into upper and lower chambers. (12 Dec 1998) |
| cor triloculare | <cardiology, embryology> Three-chambered heart due to absence of the interatrial or the interventricular septum. (05 Mar 2000) |
| cor triloculare biatriatum | <cardiology, embryology> Absence of the interventricular septum. (05 Mar 2000) |
| cor triloculare biventriculare | <cardiology, embryology> Absence of the interatrial septum. (05 Mar 2000) |