2) surgery. The Columbia Encyclopedia, Sixth Edition. 2001
...Early HistoryIn prehistoric times, sharpened flints and other sharp-edged devices were used to perform various surgical operations. Circumcision and other ritualistic...

3) Washington University. The Columbia Encyclopedia, Sixth Edition. 2001
...Washington University, at St. Louis, Mo.; coeducational; est. as Eliot Seminary 1853, opened 1854, renamed 1857. It has a well-known medical school and school of...

4) americium. The Columbia Encyclopedia, Sixth Edition. 2001
...Americium is a silver-white metal thought to have either a loose-packed cubic or a close-packed double hexagonal crystalline structure. The pure metal has been prepared...