diastasis

UK: /daɪˈæstəsɪs/ US: (dī as′tə sis)

WordReference Random House Unabridged Dictionary of American English © 2025

di•as•ta•sis  (dī as′tə sis), n., pl. -ses 

(-sēz′). 
1. Medicine the separation of normally joined parts, as in the dislocation of bones, without fracture.
2. Physiology the diastolic rest period immediately preceding systole.

• Greek diástasis a separation. See dia-, stasis
• Neo-Latin
• 1735–45

Collins Concise English Dictionary © HarperCollins Publishers::

diastasis / daɪˈæstəsɪs/ noun ( -ses / -ˌsiːz/)

1. the separation of an epiphysis from the long bone to which it is normally attached without fracture of the bone
2. the separation of any two parts normally joined
3. the last part of the diastolic phase of the heartbeat

Etymology: 18th Century: New Latin, from Greek: a separation, from diistanai to separate, from dia- + histanai to place, make stand

diastatic / ˌdaɪəˈstætɪk/ adjective