Related Clues:
- ''Outside'' prefix
- Prefix with scope or morph
- Physics prefix for sphere
- Prefix with thermic
- ''Outer'' starter
- Internal prefix
- Skeleton prefix
- Within, at first
- Prefix for 'skeleton'
- Root canal procedure, briefly
- High-quality cannabis, in slang
- Start for skeleton or sphere
- Prefix that's the opposite of 38-Down
- Root canal performer, informally
- Exo- opposite