Definitions

1. noun

A rare or exceptional case of a woman giving birth to a child that has been fertilized by the sperm of a man other than her husband, particularly one who has previously fathered a child with her.

“The medical report confirmed that the woman was experiencing a case of celiocyesis, as the child’s DNA did not match her husband’s.”

2. noun

In some cases, an instance of heteropaternal superfecundation.