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Definition of Lithopedion
1. Noun. (medical) A calcium-encased foetus that occurs in ectopic abdominal pregnancies when the foetus dies and is not reabsorbed by the maternal body, whereby the maternal system encases the foreign body (foetus) in calcium to isolate it. ¹
¹ Source: wiktionary.com
Medical Definition of Lithopedion
1. Lithopedium A retained foetus, usually extrauterine, which has become calcified. Origin: Litho-+ G. Paidion, small child (05 Mar 2000)