Hydrocephalus is a buildup of fluid inside the skull that leads to brain swelling. Hydrocephalus means water on the brain.
locant. (chemistry). The portion of a chemical name, usually a number or a letter, that designates the position of an atom or group of atoms in a formula unit. 1  Facebook. 2  Twitter.
A dental material consisting of powdered mercury, silver and tin which, when mixed, may be forced into a drilled and cleaned cavity in a tooth where it hardens within a few minutes. Surprisingly, in spite of occasional expressed concern, amalgam does not seem to present the risk of mercury poisoning.