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Related to aitchbone: rump steak
1. The rump bone, especially of cattle.
2. The cut of beef containing the rump bone.
[Alteration (influenced by aitch) of Middle English hach-boon, from an hach-boon, an aitchbone, alteration of a nachebon : nache, buttock (from Old French, from Late Latin naticās, accusative pl. of natica, buttock, from Latin natis) + bon, bone; see bone.]
1. (Zoology) the rump bone or floor of the pelvis in cattle
2. (Cookery) a cut of beef from or including the rump bone. Also called: edgebone
[C15 hach-boon, altered from earlier nache-bone, nage-bone (a nache mistaken for an ache, an aitch; compare adder1); nache buttock, via Old French from Late Latin natica, from Latin natis buttock]