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Meaning of bellyboard

bel•ly•board

Pronunciation: (bel'ē-bôrd", -bōrd"), [key]
— n.
  1. a small surfboard, usually 3–4 ft. (0.9–1.2 m) long, for riding waves on one's belly, sometimes used in conjunction with swim fins.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.