- Separation of normally joined anatomical parts, as of certain abdominal muscles during pregnancy.
- The last stage of diastole in the heart, occurring just before contraction and during which little additional blood enters the ventricle.
Origin of diastasisGreek separation from diistanai to separate dia- apart ; see dia- . histanai to cause to stand ; see stā- in Indo-European roots.
From New Latin, from Ancient Greek Î´Î¹Î¬ÏƒÏ„Î±ÏƒÎ¹Ï‚ (diÃ¡stasis, “separation, standing aloof"), from Î´Î¹Î¬ (diÃ¡) + ÏƒÏ„Î¬ÏƒÎ¹Ï‚ (stÃ¡sis, “standing"). Compare diastema.