Related Clues:

• Geometry prefix
• Half of hexa-
• One less than tetra-
• Corn or pod prefix
• Prefix for ''ten''
• Denoting three
• Penta- doubled
• Eight (Pref.)
• Word form for ''eight''
• Pod prefix
• Plane heading?
• Cycle's front-end?
• Denotes three
• Prefix for cycle
• Prefix meaning ''three''