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a. Characterized by convexity; protuberant: a gibbous seashell.
b. More than half but less than fully illuminated from the point of view of an observer. Used of phases of the moon or the planets.
2. Archaic Having a hump; humpbacked.
[Middle English, bulging, from Late Latin gibbōsus, hunch-backed, from Latin gibbus, hump.]
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|Noun||1.||gibbousness - something that bulges out or is protuberant or projects from its surroundings; "the gun in his pocket made an obvious bulge"; "the hump of a camel"; "he stood on the rocky prominence"; "the occipital protuberance was well developed"; "the bony excrescence between its horns"|
excrescence, extrusion, gibbosity, hump, jut, bulge, protrusion, protuberance, swelling, bump, prominence
frontal eminence - either prominence of the frontal bone above each orbit
occipital protuberance - prominence on the outer surface of the occipital bone
belly - a part that bulges deeply; "the belly of a sail"
caput - a headlike protuberance on an organ or structure; "the caput humeri is the head of the humerus which fits into a cavity in the scapula"
mogul - a bump on a ski slope
snag - a sharp protuberance
wart - any small rounded protuberance (as on certain plants or animals)
projection - any solid convex shape that juts out from something