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Related Clues:
- Thermal opening
- Skeletal prefix
- Intro to biology?
- Patient's conclusion following City 'treatment'?
- ''Outer'' prefix
- Lead-in to skeleton
- Opposite of "endo-"
- Prefix with planet
- Start for skeleton
- Skeletal start?
- Start for sphere or skeleton
- ''Outside'' prefix
- Physics prefix for sphere
- Prefix with thermic
- ''Outer'' starter