The nature of possible underlying disease states including cancer or infections can often be detected by microscopically visualizing cytological changes in cells which are exfoliated and captured by fluid extraction from body cavity, brushings, washings, or fine needle aspirations.
Cloister definition, a covered walk, especially in a religious institution, having an open arcade or colonnade usually opening onto a courtyard. See more.
noun, plural hierarchies. 1. any system of persons or things ranked one above another. 2. government by ecclesiastical rulers. 3. the power or dominion of a hierarch. 4. an organized body of ecclesiastical officials in successive ranks or orders: the Roman Catholic hierarchy.