/aych"bohn'/ , n.
1. the rump bone, as of beef.
2. the cut of beef that includes this bone.
Also, edgebone .
[ 1480-90; earlier hach-boon (with spurious h- ); ( h ) ach var. by misdivision as an ( h ) ach ( e ) of a nache rump natica, fem. of * naticus of the rump, equiv. to L nati ( s ) rump, NATES + -cus adj. suffix ]