abruptio placentae

noun

ab·​rup·​tio pla·​cen·​tae ə-ˌbrəp-shē-ˌō-plə-ˈsent-(ˌ)ē  -tē-ˌō- 

plural abruptio placentarum -ˌplas-ᵊn-ˈtar-əm  -ˈtär-  or abruptiones placentarum -shē-ˌō-(ˌ)nēz-  -tē-ˌō-ˌnās- 

: premature detachment of the placenta from the wall of the uterus

called also ablatio placentae