PERIOD

n. Per'ia-o2d. Gr., irepioios (from irepi. around, and 6Sds, a way). Lat., period us. Fr., periods. Ger., Periode. The time during which a proce or a condition continues, or at which an act or an event takes place. In the pi., the menses, [a, 48.] See also STAGE. Child-bearing p. Fr., periode uterine. The p. of life in the female during which she is capable of procreation, extending from puberty to the menopause. Dodging p. A vulgar term for the menopause. Incubation p. of disease, Incubative p. See INCUBATION (2d def.). Inter eruptive p. Of an eruptive fever, the time between the first appearance of the eruption in a primary case which is the source of infection and that of the case or cases that originate from the first. [Makuma, " Med. Times and Gaz.," May 13, 1882, p. 495.] Intermenstrual p. Fr., epoque intermenstruel. The interval between two menstruations. Menstrual p. Lat., period us lunar is. Fr., epoque menstruelle (ou cat a men i ale). Ger., Menstruationszeit. An individual act of menstruation. Puerperal p. Lat., puerperium. Fr., suites de couches, etat puerperal,per i ode puer per ale. Ger., Wochenbett, Wochenbeltzeit, Wochenbettsperiode. The p. that elapses between delivery and the first menstruation thereafter; or the p. between delivery and the approximate return of the parts altered by pregnancy (except the breasts) to their original condition. [A, 27. 61.] Reaction-p. Of Exner, in his method of measuring the rapidity of cerebral proce es, the p. that elapses between the application of a stimulus and the making of a given signal by the subject of the stimulus. [Pfliiger (K).] Reduced reaction-p. Of Exner, the time required by the brain to transform an afferent into an efferent impulse. [K.] Respiratory p. The time intervening between the beginnings of two succe ive inspirations. U, 16.] [s. 240]