=Spi´ro-chæ´´te.= A genus or form of flexile spirobacteria. =Sta´sis.= A stoppage of the flow of fluid in any organ or any part of the body. =Ste-no´sis.= Narrowing or stricture of a duct or canal. =Ster´ile.= Nonfertile. =Ster´il-i-za´´tion.= The act or process of rendering sterile. =Still-birth.= The birth of a dead fœtus. =Stim´u-lant.= 1. Producing stimulation. 2. An agent or remedy that produces stimulation. =Strep´to-coc´´cus.= A genus or form of bacterial organism, which grows in consecutive links, like a chain. =Stri´a=, pl. _striæ_. Streaks or lines. =Stro´ma.= The tissue which forms the ground substance, framework, or matrix of an organ. =Styp´tic.= Astringent, an agent for arresting hæmorrhage. =Sub´in-vo-lu´´tion.= Incomplete involution; failure of a part to return to its normal size and condition after enlargement from functional activity. =Sup-pos´i-to-ry.= An easily fusible medicated mass to be introduced into the vagina, rectum, or urethra. =Su´ture.= 1. Surgical stitch or seam. 2. The line of junction of adjacent cranial or facial bones. =Sym´phys-e-ot´´o-my.= The division of the fibrocartilage of the symphysis pubis in order to facilitate delivery by increasing the anteroposterior diameter of the pelvis. =Sym´phy-sis.= The line of junction and fusion between bones originally distinct. The symphysis pubis. =Syn´chro-nous.= Occurring at the same time. =Syph´i-lis.= A contagious venereal disease leading to many structural and cutaneous lesions, due to a microorganism called the spirochæta pallida. =Tam´pon.= A plug made of cotton, sponge, or oakum. =Te-nac´u-lum.= A hook-like instrument for seizing and holding tissues. =Te-nes´mus.= Straining, especially ineffectual and painful straining. =Throm´bus.= A plug or clot in a vessel remaining at the point of its formation. =Tinc´ture.= The solution of medicinal substances in fluids other than water or glycerine. There is usually about one part of the drug to eight of alcohol. =Tis´sue.= An aggregation of cells, fibers and various cell-products forming a structural element. =Tox-æ´mi-a.= Blood poisoning. =Tox´in.= Any poisonous albumin produced by bacterial action. =Trau´ma.= A blow, wound, or other violent injury. =Trau´ma-tism.= A condition of the system due to injury. =Tu´mor.= 1. Swelling; morbid enlargement. 2. A neoplasm. A mass of new tissue which persists and grows independently of its surrounding structures, and which has no physiologic use. =Tym´pa-ni´´tis.= Distention of the abdomen from gas. =Um-bil´i-cal.= Pertaining to the umbilicus. =Um-bi-li´cus.= The navel. =U´ra-chus.= A cord that extends from the apex of the bladder to the navel. It represents the remains of the canal in the fœtus which joins the bladder with the allantois.