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

Encyclopedia: Radio-opaque

• antipsychotic
• antipsychotic agent
• antipsychotic drug
• antipyresis
• antipyretic
• antiquarian
• antiquarianism
• antiquark
• antiquary
• antiquate
• antiquated
• antique
• antiquity
• antiredeposition
• Antirrhinum
• Antirrhinum coulterianum
• Antirrhinum filipes
• Antirrhinum majus
• antisatellite
• antiscorbutic
• antisemitic
• antisemitism
• antisepsis
• antiseptic
• antiseptically