Having a rounded hump or swollen projection; more than half but not completely full (as with the moon).
From Latin gibbosus, meaning 'humped' or 'hunchbacked,' derived from gibbus (hump). The word entered English in the 16th century, initially used in anatomy and astronomy.
The moon spends most of its cycle in gibbous phase—yet most people only know 'full' and 'new!' This overlooked phase is actually the most common view of a moonlit night.
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