Meaning Of The Word Penumbra

Real Dictionary

What's the definition of Penumbra? Find Penumbra meanings, definitions and more at the Real Dictionary online.

Penumbra Meaning

Penumbra Definition
Penumbra Definition

What's The Definition Of Penumbra?

penumbra
countable noun: A penumbra is an area of light shadow.

penumbra in American English
the partly lighted area surrounding the complete shadow (umbra) of a body, as the moon, during an eclipse
noun: the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off

penumbra in British English
noun: a fringe region of half shadow resulting from the partial obstruction of light by an opaque object

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