The Collaborative International Dictionary
Gibbously
Gibbous \Gib"bous\, a. [Cf. F. gibbeux. See Gibbose.]
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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. Hunched; hump-backed. [Obs.]
--Sir T. Browne. -- Gib"bous*ly, adv. -- Gib"bous*ness, n.
Wiktionary
gibbously
adv. In a gibbous manner.