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 crystal of alum, an astringent. An astringent (occasional alternative: adstringent) substance is a chemical compound that tends to shrink or constrict body tissues. The word astringent derives from Latin adstringere, meaning to bind fast. Two common examples are calamine lotion and witch hazel. Another example is yerba mansa, a native plant of California.