penumbra /pe-numˈbrə/

1. A partial or lighter shadow round the perfect or darker shadow produced by an eclipse or by a large unfocused light source shining on an opaque object
2. The less dark border of a sunspot or any similar spot
3. The part of a picture where the light and shade blend into each other

• belly-flops
• bellyful
• bellyfuls
• belly-god
• belly-gods
• bellying
• bellyings
• belly landing
• belly landings
• belly laugh
• belly laughs
• belly tank
• belly tanks
• belly-timber
• belly-timbers
• belly up to
• belomancies
• belomancy
• Belone
• belong
• belonged
• belonger
• belongers
• belonging
• belongings