Theron drew a heavy sigh, and let his fingers toy abstractedly with a ribbon on the outer edge of Celia's penumbra of apparel.
Each spot is quite sharply divided into an umbra and a penumbra.
Two tears, phosphorescent in the penumbra, rolled from the eyes of the painter.
To-day, even, we can see the Dawn: the penumbra is vanishing.
The next circle is less dark, and called the penumbra, because it so closely resembles the penumbra.
And Porter was still working away, looking ghostly in the penumbra.
The world became a sort of kaleidoscope to us, seen in a dream through the penumbra of an aquarium.
But the disappearance of the gods does not yet bring us within the penumbra of history.
Now I will try and explain to you what the penumbra is and how it is produced.
She saw the door open and limned in a penumbra of darkness the white comely face of a woman.
Plural penumbras or penumbrae (pĭ-nŭm'brē)