Related Clues:

• Outside (Pref.)
• Plasm starter
• Outer opening
• Prefix meaning ''outer''
• It means ''outside''
• Prefix meaning 'outer'
• Plasm prefix
• Morph or plasm preceder
• Endo- opposite
• Prefix with -plasm
• Start to morph
• The Ghostbusters' license plate, ___ 1
• Prefix for "parasite" or "plasm"
• Morph lead-in
• Outer: Pref.