=Ru´gæ.= Wrinkles or folds. =Rup´ture.= 1. Forcible tearing or breaking of a part. 2. Hernia. =Sa´crum.= The triangular bone situated at the end of the spine. It is formed of five vertebræ, amalgamated and wedged in between the two innominate bones. =Sag´it-tal.= Shaped like, or resembling, an arrow. =Sal´i-va´´tion.= An excessive discharge of saliva. =Sal´pin-gi´´tis.= Inflammation of an oviduct or of the eustachian tube. =Sal´´var-san´.= A compound invented by Ehrlich for the treatment of diseases caused by the Spirillæ, such as syphilis and recurrent fever. It is popularly called 606. =Sa-præ´mi-a.= Poisoning of the blood by the absorption of toxins from localized infections as from the uterus. =Scap´u-la.= The shoulder blade. =Scro´tum.= The pouch which contains the testicles and their accessory organs. =Se-ba´ceous.= 1. Pertaining to sebum or suet. 2. Secreting a greasy lubricating substance. =Se-cre´tion.= 1. The process or function of separating various substances from the blood. 2. Any secreted substance. =Sec´un-dines.= All that remains in the uterus after the birth of the child is called secundines—placenta, membrane and cord. =Se´men.= 1. A seed or seed-like fruit. 2. The thick whitish liquid fecundating secretion produced in coition. =Shock.= Sudden vital depression, due to an injury or emotion which makes a sinister impression upon the nervous system. =Show.= The appearance of blood that foreruns a labor or menstruation. =Sin´a-pism.= A plaster or paste of ground mustard-seed; a mustard plaster. =Sin´ci-put.= The portion of the head lying in front of the anterior or large fontanelle. =Si´nus.= 1. A recess, cavity or hollow space. 2. A dilated channel for venous blood, found chiefly within the cranium and uterus during gestation. 3. An air-cavity, in one of the cranial bones, especially one communicating with the nose, such are the ethmoidal frontal maxillary and sphenoidal sinuses. 4. A suppurating channel or fistula. =Smeg´ma.= A thick, cheesy, ill-smelling secretion found under the prepuce and around the labia minora. =So-lu´tion.= 1. The process of dissolving. 2. A liquid containing dissolved matter. =Sor´des.= The dark brown matter which collects on the lips and teeth in low fevers. =Spas´mo-phil´´ic di-ath´e-sis.= Is a condition characterized by an increased elective irritability and a tendency to spasm, like contractions of one or more groups of muscles. (Grulee). =Spe-cif´ic.= 1. Pertaining to a species. 2. Produced by a single kind of microorganism. 3. A remedy specially indicated for any particular disease. =Sper´ma-to-zo´´on.= The motile generative element of the semen which serves to impregnate the ovum. =Spi´na bif´i-da.= Congenital cleft of the vertebral column with meningeal protrusion.