1. Not transparent to X-rays or other forms of radiation
   - radiopaque

Encyclopedia: Radio-opaque

• boardinghouse
• boardroom
• boards
• boardwalk
• boarfish
• boarhound
• boast
• boaster
• boastful
• boastfully
• boastfulness
• boasting
• boat
• boat bug
• boat club
• boat deck
• boat hook
• boat paddle
• boat racing
• boat train
• boat whistle
• boat-billed heron
• boat-race
• boat-shaped
• boatbill