butt knuckle
noun
: a projection shaped like a knuckle usually of metal and designed to receive pressure (as from a window pole)
Word History
Etymology
butt entry 2
- biologist
- biologistic
- biologists
- biologize
- biology
- bioluminescence
- bioluminescences
- bioluminescent
- biolyses
- biolytic tank
- biomagnification
- biomagnified
- biomagnifies
- biomagnify
- biomagnifying
- biomarker
- biomarkers
- biomass
- biomasses
- biomaterial
- biomaterials
- biomathematical
- biomathematician
- biomathematicians
- biomathematics