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

• herbaged
• herbages
• herbal
• herbalism
• herbalisms
• herbalist
• herbalists
• herbal medicine
• herbal medicines
• herbals
• herbal tea
• herbal teas
• herbar
• herbaria
• herbarian
• herbarians
• herbaries
• herbarium
• herbariums
• herbars
• Herbartian
• herbary
• herb-beer
• herb-beers
• herb bennet