ischiopagus

The story

1. Ancient Greek · derived fromἴσχιον“hip”
2. English todayischiopagus

From Ancient Greek ἴσχιον (ískhion, “hip”) + πάγος (págos, “fixed, set”) (from πήγνυμι (pḗgnumi, “fasten, fix, set”)); equivalent to ischio- + -pagus.