gibbous

gib·bous

adj \ˈji-bəs, ˈgi-\

Definition of GIBBOUS

1

a : marked by convexity or swelling b of the moon or a planet : seen with more than half but not all of the apparent disk illuminated

2

: having a hump : humpbacked

Origin of GIBBOUS

Middle English, from Late Latin gibbosus humpbacked, from Latin gibbus hump

First Known Use: 14th century

Other Astronomy Terms

nadir, nebulous, penumbra, retrograde, sidereal, syzygy, wane, wax, zenith