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

• triplane
• triplanes
• triple
• Triple Alliance
• triple bill
• triple bogey
• triple bond
• triple bonds
• triple crown
• triple-crowned
• triple crowns
• tripled
• Triple Entente
• triple event
• triple events
• triple glazing
• triple harp
• triple harps
• triple-headed
• triple jump
• triple-jump
• triple-jumped
• triple-jumper
• triple-jumpers
• triple-jumping