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

penumˈbral adjective

penumˈbrous adjective

• curvier
• curviest
• curvifoliate
• curviform
• curvilineal
• curvilineally
• curvilinear
• curvilinearities
• curvilinearity
• curviness
• curvinesses
• curving
• curvirostral
• curvital
• curvities
• curvity
• curvy
• curé
• curés
• cuscus
• cuscuses
• cusec
• cusecs
• cush
• cushat