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

Encyclopedia: Radio-opaque

• scrubbiness
• scrubbing
• scrubbing brush
• scrubbird
• scrubby
• scrubland
• scrubs
• scruff
• scruffily
• scruffy
• scrum
• scrum-half
• scrummage
• scrummy
• scrump
• scrumptious
• scrumptiously
• scrumpy
• scrunch
• scrunch up
• scrunchie
• scrunchy
• scruple
• scruples
• scrupulosity