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umbra
Umbra is shadow, or a dark tone or area.
(noun)- An example of an umbra is the shadow beyond a streetlight.
- An example of an umbra is the darkest part of the shadow cast by an eclipse.
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See umbra in Webster's New World College Dictionary
- shade or a shadow
- the dark central cone of shadow projecting from a planet or satellite on the side opposite the sun
- the dark central part of a sunspot
- Rare a phantom, or ghost
- Physics a perfect or complete shadow, in which no direct light is received from the source of illumination
Origin: L, a shade, shadow
Related Forms:
- umbral adjective
See umbra in American Heritage Dictionary 4
noun pl. um·bras or um·brae (-brē)
- A dark area, especially the blackest part of a shadow from which all light is cut off. See Synonyms at shade.
- Astronomy a. The completely dark portion of the shadow cast by the earth, moon, or other body during an eclipse.b. The darkest region of a sunspot.
Origin:
Origin: Latin, shadow
.Related Forms:
- umˈbral adjective
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