01 a. Swelling by a regular curve or surface; protuberant; convex; as, the moon is gibbous between the half-moon and the full moon.
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1.
Swelling by a regular curve or surface; protuberant; convex; as, the moon is gibbous between the half-moon and the full moon.“The bones will rise, and make a gibbous member.” — Wiseman.
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2.
Hunched; hump-backed.[Obs.]