periclinal /per-i-klīˈnəl/

1. Sloping downwards in all directions from a point (geology)
2. Parallel to the outer surface (botany)

• double-banking
• double-banks
• double bar
• double-barreled
• double-barrelled
• double bars
• double bass
• double basses
• double bassoon
• double bed
• double beds
• double bill
• double bind
• double binds
• double-biting
• double-blind
• double bluff
• double bluffs
• double bogey
• double boiler
• double boilers
• double bond
• double bonds
• double-book
• double-booked