Wiktionary
abruptio placentae
n. (context gynaecology English) A premature separation of the placenta from the uterine wall.(R:MW3 1976: page=6)(First attested in the mid 20th century.)(R:SOED5: page=8)
WordNet
abruptio placentae
n. a disorder of pregnancy in which the placenta prematurely separates from the wall of the uterus
Usage examples of "abruptio placentae".
One of them is called a 'placenta previa' and the other is called 'abruptio placentae.