| gingival pocket | An abnormal extension of a gingival sulcus not accompanied by the apical migration of the epithelial attachment. (12 Dec 1998) |
|---|---|
| periodontal pocket | An abnormal extension of a gingival sulcus accompanied by the apical migration of the epithelial attachment and bone resorption. (12 Dec 1998) |
| 1. A bag or pouch; especially; a small bag inserted in a garment for carrying small articles, particularly money; hence, figuratively, money; wealth. 2. One of several bags attached to a billiard table, into which the balls are driven. 3. A large bag or sack used in packing various articles, as ginger, hops, cowries, etc. In the wool or hop trade, the pocket contains half sack, or about 168 Ibs.; but it is a variable quantity, the articles being sold by actual weight. 4. A hole or space covered by a movable piece of board, as in a floor, boxing, partitions, or the like. 5. <chemical> A cavity in a rock containing a nugget of gold, or other mineral; a small body of ore contained in such a cavity. A hole containing water. 6. <zoology> Same as Pouch. Pocket is often used adjectively, or in the formation of compound words usually of obvious signification; as, pocket comb, pocket compass, pocket edition, pocket handkerchief, pocket money, pocket picking, or pocket-picking, etc. Out of pocket. See Out, Pocket borough, a borough "owned" by some person. See Borough. Pocket gopher, a sheriff appointed by the sole authority of the crown, without a nomination by the judges in the exchequer. Origin: OE. Poket, Prov. F. & OF. Poquette, F. Pochette, dim. Fr. Poque, pouque, F. Poche; probably of Teutonic origin. See Poke a pocket, and cf. Poach to cook eggs, to plunder, and Pouch. Source: Websters Dictionary (01 Mar 1998) |
|
| Seessel's pocket | The part of the embryonic foregut extending cephalad to the level of the oral plate and caudal to the pituitary diverticulum (Rathke's pouch). Synonym: preoral gut. (05 Mar 2000) |
| subcrestal pocket | A pocket extending apically below the level of the adjacent alveolar crest. Synonym: infrabony pocket, intrabony pocket. (05 Mar 2000) |
| Troltsch's pocket | Synonym: anterior recess of tympanic membrane, posterior recess of tympanic membrane. (05 Mar 2000) |
| artificial pacemaker | Any device that substitutes for the normal pacemaker and controls the rhythm of the organ; especially an electronic cardiac pacemaker, which may be implanted in the chest, with electrodes attached to the external cardiac surface, or passed through the venous circulation into the right side of the heart (pervenous pacemaker). (05 Mar 2000) |
| cardiac pacemaker | An electrical device which delivers a small stimulant shock to the heart to effect cardiac contraction at a pre-determined rate. Many of today's pacemakers have two main components: the electrodes and the transducer (pulse generator). The electrodes are wires which are placed into the circulatory system and make physical contact with the heart muscle. A small electrical discharge from the pacemaker electrode stimulates the muscular wall of the heart to contract, thus pumping blood in an organised fashion. The transducer is a small device, usually implanted under the skin, that generates the electrical discharge at a pre-determined frequency. Transducers can monitor your heart's rate of contraction and deliver an electrical shock only when the heart is going too slow. (27 Sep 1997) |
| pacemaker | 1. <apparatus, physiology> An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. 2. <biochemistry> A substance whose rate of reaction sets the pace for a series of interrelated reactions. (24 Mar 1998) |
| pacemaker, artificial | A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external). (12 Dec 1998) |
| pacemaker failure | Failure of an artificial pacemaker to generate or deliver effective stimuli to the myocardium. (05 Mar 2000) |
| pacemaker output | Electrical energy delivered into a standard load (500 ohms resistance). (05 Mar 2000) |
| pacemaker potential | The voltage inscribed by impulses from an artificial electronic pacemaker. (05 Mar 2000) |
| pacemaker sensitivity | The minimum cardiac activity required to consistently trigger a pulse generator. (05 Mar 2000) |
| pacemaker syndrome | <syndrome> The occurrence of symptoms relating to the loss of atrial-ventricular synchrony in ventricularly paced patients, or symptoms caused by inadequate timing of atrial and ventricular contractions in paced patients. (05 Mar 2000) |