fullsib

English

Etymology

full +‎ sib

Noun

fullsib (plural fullsibs)

1. A full sibling.
   • 2012, In the Light of Evolution: Volume V: Cooperation and Conflict, National Academy of Sciences:

     For example, fullsibs, considered as a genealogical category, are symmetrically related to ego. However, “fullsibs,” considered as an innate category, are ego's matrikin because of the possibility of undetected cuckoldry.