Noun: borer bo-ru(r)
- A drill for penetrating rock
"The miners used a borer to create holes for explosives in the hard rock face";
- bore bit, rock drill, stone drill
- Any of various insects, larvae or mollusks that bore into wood
"The borer's tunnels weakened the tree's structure";
- woodborer
Derived forms: borers
Type of: drill, invertebrate
Encyclopedia: Borer, Thomas