katadicrotism|kætəˈdaɪkrətɪz(ə)m| [f.Gr. κατά down + dicrotism.] ‘The occurrence of dicrotism in the downward stroke of a sphygmographic tracing’ (Syd. Soc.Lex. 1887). Commonly expressed by dicrotism without prefix (see dicrotic a.), the opposite being anacrotism.