Gibbous

Gibbous, a term signifying 'protuberant,' 'swelling out,' applied to bodies which are double- convex, and particularly to the moon, when she is within a week of the full.—GIBBOSITY (Lat. gibbus, 'humpbacked') is a state of disease characterised by protuberance of a part of the body; chiefly applied to humpback or other distortions depending on disease (Rickets, q.v.) of the spinal column.