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n. pl. di·as·ta·ses (-sēz′)
1. Separation of normally joined anatomical parts, as of certain abdominal muscles during pregnancy.
2. The last stage of diastole in the heart, occurring just before contraction and during which little additional blood enters the ventricle.
[Greek, separation, from diistanai, to separate : dia-, apart; see dia- + histanai, to cause to stand; see stā- in Indo-European roots.]
di′a·stat′ic (dī′ə-stăt′ĭk) adj.
di•a•stat•ic(ˌdaɪ əˈstæt ɪk)
also di•a•sta•sic(-ˈsteɪ sɪk)
1. of or pertaining to diastase.
2. having the properties of diastase: diastatic action.