From Wiktionary, the free dictionary
From womb + -mate.
- IPA(key): /ˈwuːm.meɪt/
- Hyphenation: womb‧mate
wombmate (plural wombmates)
- A sibling with whom an unborn child shares the womb.
1999, Judith Rich Harris, The Nurture Assumption: Why Children Turn Out the Way They Do:The chance to meet one's wombmate, possibly for the first time since the umbilical cords were cut, is irresistible.