1. Flat on one side and convex on the other

See also: bulging, convex

• punch-drunk
• punch-up
• punchayet
• punchball
• punchboard
• punched card
• punched tape
• puncheon
• puncher
• Punchinello
• punching bag
• punching ball
• punchy
• punctate
• punctilio
• punctilious
• punctiliously
• punctiliousness
• punctual
• punctuality
• punctually
• punctuate
• punctuated equilibrium
• punctuation
• punctuation mark