ˈāchˌbōn noun
also edge·bone ˈejˌ-
Etymology: Middle English hachboon, (assumed) achebon, alteration (resulting from incorrect division of a nachebon ) of (assumed) nachebon, from nache, nage buttock (from Middle French, from Late Latin natica, from Latin natis ) + bon bone — more at nates
1. : the hipbone especially of cattle
2. : the cut of beef containing the aitchbone