The Collaborative International Dictionary of English v.0.48:

Gibbose \Gib*bose"\, a. [L. gibbosus, fr. gibbus, gibba, hunch,
   hump. Cf. Gibbous.]
   Humped; protuberant; -- said of a surface which presents one
   or more large elevations. --Brande & C.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gibbose
    adj 1: (used of the moon) more than half full [syn: gibbous,
           gibbose]