I have a half brother on my mom's side. He has a half sister on his dad's side. Is there a single word/term for describing that sister's relation to me? Currently I just say "my half brother's half sister".

  • @sumelic cross sibling works! hopefully peeople know what I mean when I say it... Ill close the question, just wish there was a more mainstream word as this is a pretty typical situation – chiliNUT Sep 9 '15 at 4:21
  • Yeah, I agree with you that none of the existing terms are fully satisfying. – herisson Sep 9 '15 at 4:23
  • "Quarter sibling" could be used colloquially, but it does not relate to the correct but inoften-used "three-quarter sibling". – Ignacio Vazquez-Abrams Sep 9 '15 at 4:23