VIS

(Lat.), n. f. Vi=s(wes). Gen., vis; plur., vires. Gr., Is. See FORCE and POWER. V. a tergo. Pre ure from behind (used especially, in physiology, for that exerted by the heart's action on the circulation of the blood). [K.] V. conservatrix. See V. medicatrix naturae. V. contracting insita. See Muscular IRRITABILITY. V. e ential is [Wolff]. The " physical soul," the mysterious cause of the development of animal organisms according to the Wolffian theory of epigenesis. [A, 42.] V. expultrix. An old term for a supposed force which effected the removal of excrementitious matters from the system. [K.] V. formatiya. See Plastic FORCE. V. insita [Haller]. The inherent irritability of a muscle (cf. V. nervosa, 2d def.). [K.] V. medicatrix. A remedial force or impulse, [a. 48.] V. medicatrix naturae. Ger., Naturheilung. The remedial impulse of nature; the self-recuperative power of the bodily system independent of the use of medicines, [a, 48.] V. metabolic a. See METABOLISM. V. mortua [Haller]. The physical properties of ti ues aside from those depending on their vitality (e. g., the elasticity which may remain in tendons after the occurrence of somatic death). [K, 3.] V. muscular is. See Muscular FORCE. V. nervosa. 1. See Nervous POWER. 2. Of Haller, the nerve-current which excites a muscular contraction (cf. V. insita). [K.] V. oppos it a. Ger., Gegenkraft. A force acting in the direction opposite to that of another force or of the resultant of other forces, [a, 48.] Ar. plastic a. See Plastic FORCE. V. vitae, V. vital is. The energy or force that characterizes an organism in virtue of its po e ing life. [a, 48.] V. viva. See Living FORCE. [s. 718]