Abbreviation for Genetic Half Siblings. With identical twins, when they grow up and marry, their children will be genetically from the same person-- the cousins will be half-siblings, genetically. Variations are Genetic Half Sister and Genetic Half Brother
Eric and Derek are identical twins. Eric married Lucy and had Ike; Derek married Susan and had Lisa. Ike and Lisa are GHS's.
by Meg/Ana April 23, 2006