umbra


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umbra

um·bra

 (ŭm′brə)
n. pl. um·bras or um·brae (-brē)
1. A dark area, especially the blackest part of a shadow from which all light is cut off.
2. Astronomy
a. The completely dark central portion of the shadow cast by the earth, moon, or other body during an eclipse.
b. The darkest region of a sunspot.

[Latin, shadow.]

um′bral adj.

umbra

(ˈʌmbrə)
n, pl -brae (-briː) or -bras
1. (Astronomy) a region of complete shadow resulting from the total obstruction of light by an opaque object, esp the shadow cast by the moon onto the earth during a solar eclipse
2. (Astronomy) the darker inner region of a sunspot
[C16: from Latin: shade, shadow]
ˈumbral adj

um•bra

(ˈʌm brə)

n., pl. -bras, -brae (-brē).
1. shade; shadow.
2. the usual accompaniment or companion of a person or thing.
3. Astron.
a. the complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off.
b. the dark central portion of a sunspot.
4. a phantom or ghost.
[1590–1600; < Latin: shade, shadow]
um′bral, adj.

um·bra

(ŭm′brə)
1. The darkest part of a shadow, especially the completely dark portion of the shadow cast by Earth, the moon, or another body during an eclipse.
2. The darkest region of a sunspot. Compare penumbra.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.umbra - a region of complete shadow resulting from total obstruction of lightumbra - a region of complete shadow resulting from total obstruction of light
shadow - shade within clear boundaries

umbra

noun
Comparative darkness that results from the blocking of light rays:
Translations

umbra

n pl <-s or -e> (Astron: = shadow) → Kernschatten m; (in sunspot) → Umbra f
References in periodicals archive ?
This indicates that the bright region with the strong field is a penumbra belonging to the southern umbra (S-pole).
When the Moon is within Earth's umbral cone, no direct sunlight falls on its surface, so the umbra is darker than the penumbra.
On Monday, 14 states of the United States are going to be directly under the path of umbra and the lucky ones along this path are going to experience the total solar eclipse.
With tens of thousands of archival and manuscript materials that document the history of African descendant literature and culture--correspondence, pamphlets, screenplays, newspaper clippings, photographs, sheet music, ephemera, including the Penumbra Theatre Company Archives--the Givens Collection is an invaluable community and scholarly resource, and is a key foundation of Umbra Search with the Digital Public Library of America corpus providing over half of the content found in Umbra Search.
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Hughes's long poem initiates the blend of cultural, political, and musical histories that recur in later Umbra and Black Arts poetry.
Umbra Woodrow Waste Bin, PS20, Black By Design Ltd, tel: 01889 502716, www.
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