Meanings (ES + gloss)
penumbra
A partially shaded area around the edges of a shadow, especially an eclipse.
The other places see the penumbra of the moon's shadow fall on the earth, so the eclipse is partial, and part of the sun's disc is still visible.
[A]ny penumbral fringe that may be detected cannot be well distinguished from the effects of the true penumbræ; […]
penumbra
A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.
The atmosphere was very clear, evidenced by the steadiness with which the mottling of the sun’s surface and the penumbræ of several spots were visible.
The velocities found in the penumbræ of spots generally increase with the distance from the centre of radiation, the motion being zero at some point in the umbra, and accelerating…
Phrases