Dictionary.net

• The retention in the uterus of a dead fetus two months or more after its death.

2010 - Medical Dictionary Database
By DataStellar Co., Ltd

• called also concealed a. That condition in which the ovum is retained in the uterus for a considerable time after its death, and the fetus is macerated or mummified, and finally expelled.

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe