aitchbone

from WordNet (r) 3.0 (2006)

aitchbone
    n 1: a cut of beef including the H-shaped rump bone

from The Collaborative International Dictionary of English v.0.48

Aitchbone \Aitch"bone`\, n. [For nachebone. For loss of n, cf.
   {Adder}. See {Natch}.]
   The bone of the rump; also, the cut of beef surrounding this
   bone. [Spelt also {edgebone}.]
   [1913 Webster]