umbra

1. 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. the darker inner region of a sunspot

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Umbral and penumbral regions of a shadow

umbra

(um -bră)

1. The dark inner region of a shadow cast by an object illuminated by a light of finite size rather than a pinpoint of light. The less dark outer region of the shadow is the penumbra (see illustration). The source of light is totally obscured to someone in the umbral region but only partly obscured in the penumbral region. See eclipse.

2. See sunspots.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

umbra

[′əm·brə]

(astronomy)

The dark, central region of a sunspot.

(optics)

That portion of a shadow which is screened from light rays emanating from any part of an extended source.

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References in periodicals archive

In conducting this dialogue of Umbra and Black Arts poetry with Ask Your Mama, Jazz Griots itself becomes a timely act of "historical reclamation" that asserts a more expansive literary history of radical African American jazz poetry than is usually assumed in studies of the "black aesthetic" or "the 1960s." By articulating a continuity of how "jazz performs historiography" from Ask Your Mama to Wise Why's Y's, Marcoux reveals the limitations of generational constructs of African American poetry.

Jazz Griots: Music as History in the 1960s African American Poem

This begins much more dramatically when the Moon's leading (eastern) edge enters the umbra, Earth's inner shadow, where no direct sunlight reaches.

The 2014 total lunar eclipses: the full moons of April and October will dive through earth's shadow

The Trina Turk, MaryJane's Home and Umbra presentations marked a huge step in Peking Handicraft's progression as a soft-home resource, according to CEO Mark Grand.

From private to public label: Peking Handicraft is now making a bigger statement with its own brands

Umbra is celebrating its 30th anniversary this year and as Mandelbaum--president and the majority owner--puts it in Umbra's new catalog, it's "cause for a short pause and celebration.

Umbra: 30 years young

Despite a top speed of Mach 3.2, it was not quick enough to catch-up with the umbra shadow that notched Mach 5, on that occasion.

IAF role in study of solar eclipse has been on since 1995

Este escuchara el parecer del presidente de la Conferencia episcopal umbra para las iniciativas relativas a la region umbra, o de la presidencia de la Conferencia episcopal italiana para las de mayor alcance.

Carta apostolica <> del Papa Benedicto XVI con nuevas disposiciones sobre las basilicas de San Francisco y Santa Maria de los Angeles en Asis, 9.XI.2005 *

A total lunar eclipse occurs when the moon moves into the darkest part of the Earth's shadow (called the umbra).

Photoelectric magnitude measurements of the lunar eclipses on May 16, 2003 and Oct. 28, 2004

His clients include Umbra, Issey Miyake, Prada, Nambe, Magis, Mikasa, Shiseido, Giorgio Armani, Yahoo, and Danese, among others.

Rashid brings industrial revolution to Madison Ave

Umbra (2002), her recent poetry collection, was widely lauded

Visby

This second edition has newer poems that continue to showcase Thomas's energy and intelligence, including a lovely poem written in memory of Tom Dent, the political activist, poet and cofounder of the Umbra Workshop.

Chances Are Few

Budding card sharks will love these adorable Umbra Splish Splash playing cards ($5 per deck, umbra.com), The perfect accessory far a gal who knows traditional card decks are only for squares.

Be a card shark