1. not allowing X-rays or other forms of radiation to pass through; appearing white or light on radiographic images
Usage: medical; technical

Examples

• The contrast dye made the blood vessels radiopaque on the X-ray.
• Bones appear radiopaque because they absorb X-rays effectively.
• The doctor injected a radiopaque substance to better visualize the patient’s digestive tract.
• Metal implants are highly radiopaque and show up clearly on medical scans.
• Radiopaque materials block radiation and appear bright white on imaging studies.
• The radiologist noted several radiopaque spots in the chest X-ray.