a member of the family Scolytidae and all members of the family Platypodidae (both Coleoptera)whose smaill sylindrical adults make or initiate small round (1 to 3 mm, or 0.04 to 0.12 in) tunnels (appearing in cross-section as shotholes or pinholes) in green timber and living but generally unhealthy, damaged, or dying trees —synonymn ambrosia borer, pinhole borer, shothole borer, key-hole borer —see powderpost beetle, wood borerThis definition last updated 07/15/2008