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

• a'
• a-
• A
• A1
• aa
• AA
• AAA
• AAAS
• AAC
• AAEW
• aah
• AAM
• AAP
• AAQMG
• aar
• aardvark
• aardvarks
• aardwolf
• aardwolves
• aargh
• Aaronic
• Aaronical
• Aaron's beard
• Aaron's rod
• aas