<cell biology> The movement of cells or groups of cells toward or away from each other. ... (09 Oct 1997) ... 
(si-tot´ro-piz-әm) cell movement in response to external stimulation. the tendency of viruses, bacteria, drugs, and other substances to exert their effect upon certain cells of the body.
Movement of cells towards or away from other cells.
Type: Term Pronunciation: sī-tot′rō-pizm Definitions: 1. Affinity for cells. 2. Affinity for specific cells, especially the ability of viruses to localize in and damage specific cells.
cytotropic tendency or behavior.