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The Collaborative International Dictionary
Gibbously

Gibbous \Gib"bous\, a. [Cf. F. gibbeux. See Gibbose.]

  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.

  2. Hunched; hump-backed. [Obs.]
    --Sir T. Browne. -- Gib"bous*ly, adv. -- Gib"bous*ness, n.

Wiktionary
gibbously

adv. In a gibbous manner.