CYCLE

n. Sik'l. Gr., KVKAOS. Lat., cyclus. Fr., c. Ger., Cyclus. It., Sp., ciclo. 1. A period of time in which a certain series of events or acts is completed, especially if repeated again and again. 2. The imaginary spiral described by leaves round the stem to make one complete turn (t. e., to reach a leaf which stands directly above the first). 3. A course of diet and exercise arranged in a definite manner, for a certain end. 4. See CYCLUS. [B, 291 (a, 24); L, 41.] Cardiac c. Fr., c. cardia que. The series of the THE CARDIAC CYCLE. (AFTER BRAMWELL.) 1, first sound; 2, second sound; A, first or short silence; B, second or long silence. normal auscultatory phenomena proceeding from the heart and caused by one contraction of that organ. It embraces the period comprised between the commencement of one contraction and the commencement of the contraction immediately following it, and is divided into 4 parts, viz.: 1, the first sound: 2, the first silence or pause; 3, the second sound; 4, the second silence or pause. The entire average duration of the c. has been given as 1 '058 second, but this is manifestly too great for all hearts that beat 60 or more times a minute. [Bramwell (a, 18).1 C. cardiaco-vascula ire (Fr.). The circuit made by the blood in its pa age through the organism. [L, 88.] C. <I.'-lin i (Fr.). In pathology, the period of evolution of a disease having a fixed and regular course, in which the symptoms generally succeed each other in the same order, and of which the duration can be predicted approximately. [L, 88 (a, 18).] C. febrile (Fr.). The period of the duration of fever in diseases, [a, 18.] C. foliaire (Fr.), C. folial (Fr.). See CYCLE <2d def.). C. m^tasyncritique (Fr.), C. re'corp or at if (Fr.). See CYCLUS meta syn critic us.C. r6somptif (Fr.). See CYCLUS resumptivus. [s. 482]