The penumbra is the part of a shadow where the light source is only partially blocked.
Penumbra may also refer to:
Entertainment
- Penumbra (band), a French gothic metal band
- Penumbra Diffuse, the second studio album by American progressive metal band Canvas Solaris
- "Penumbra", a song by John Ireland
- "Penumbra", a song by Tortoise
- "Penumbra" (Star Trek: Deep Space Nine), a 1999 episode of Star Trek: Deep Space Nine
- Penumbra (telenovela), Mexican telenovela
- Penumbra (World of Darkness), a region in the World of Darkness line of role-playing games
- Penumbra, a series of video games by Frictional Games consisting of:
Companies
- Penumbra Theatre Company, an African American theatre in Saint Paul, Minnesota
- Penumbra (medical company), in Alameda, California
Other uses
- Penumbra (law), a metaphor for rights implied in the United States Constitution
- Penumbra (medicine), surviving tissue at the margin of an ischemic event (such as a stroke) which is in danger of hypoxia and subsequent cell death
- Penumbra (Sun), the ring-shaped semi-bright region of a sunspot that surrounds the darker umbra
- Penumbral lunar eclipse, an eclipse that occurs when the Moon passes through the Earth's penumbra
- Billbergia 'Penumbra', a hybrid cultivar of the genus Billbergia in the Bromeliad family
See also
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