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penumbra 音标拼音: [pɪn'ʌmbrə]

XDict

n. 半影

PyDict

半影

WordNet (r) 3.0 (2006) (WordNet)

penumbra
n 1: a fringe region of partial shadow around an umbra

The Collaborative International Dictionary of English v.0.48 (gcide)

Penumbra \Pe*num"bra\, n. [NL., fr. L. paene almost umbra
shade.]
1. An incomplete or partial shadow.
[1913 Webster]

2. (Astron.) The shadow cast, in an eclipse, where the light
is partly, but not wholly, cut off by the intervening
body; the space of partial illumination between the umbra,
or perfect shadow, on all sides, and the full light. --Sir
I. Newton.
[1913 Webster]

Note: The faint shade surrounding the dark central portion of
a solar spot is also called the {penumbra}, and
sometimes {umbra}.
[1913 Webster]

3. (Paint.) The part of a picture where the shade
imperceptibly blends with the light.
[1913 Webster]

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单词	字典	翻译
penumbra	查看　penumbra　在百度字典中的解释	百度英翻中〔查看〕
penumbra	查看　penumbra　在Google字典中的解释	Google英翻中〔查看〕
penumbra	查看　penumbra　在Yahoo字典中的解释	Yahoo英翻中〔查看〕

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英文字典中文字典相关资料:

Penumbra Inc | Innovating Healthcare Technologies
Penumbra is a global healthcare company that is focused on innovating novel technologies to help as many people as possible
Boston Scientific announces agreement to acquire Penumbra, Inc.
Penumbra offers innovative mechanical thrombectomy products for use in peripheral vascular procedures to remove blood clots causing blockages in arterial, venous and pulmonary vessels, including the Lightning Bolt ® and Lightning Flash ® computer assisted vacuum thrombectomy (CAVT™) systems
Umbra, penumbra and antumbra - Wikipedia
The penumbra (from Latin paene 'almost, nearly' and umbra 'shadow') is the region in which only a portion of the light source is obscured by the occluding body, and an observer in the penumbra experiences a partial eclipse
PENUMBRA Definition Meaning - Merriam-Webster
Every solar eclipse casts an umbra, the darker central area in which almost no light reaches the earth, and a penumbra, the area of partial shadow where part of the sun is still visible Penumbra can thus be used to describe any "gray area" where things aren't all black and white
penumbra - Wiktionary, the free dictionary
The part of the moon that remains in the penumbra receives some direct sunlight, and the glare is usually great enough to prevent your seeing the faint coppery glow of the part of the moon in the umbra
Penumbra | Moon, Sun Shadow | Britannica
Penumbra, (from Latin paene, “almost”; umbra, “shadow”), in astronomy, the outer part of a conical shadow cast by a celestial body, in which the light from the source is partially blocked—as compared to the umbra (q v ), the shadow’s darkest, central part, where the light is totally excluded
Eclipse Shadow: What Is the Penumbra? - timeanddate. com
The penumbra is the shadow's lighter outer part The look of a solar or lunar eclipse depends on which shadow is involved, the umbra, penumbra, or antumbra
Careers | Penumbra Inc
Penumbra’s commitment to saving lives is chief among our values that connect our many employees who live and work in cities around the world With offices in North America, Europe, and South America, our team is well positioned to transform healthcare on an international scale
PENUMBRA Definition Meaning | Dictionary. com
In a lunar eclipse, the edge of the earth's shadow — the part that isn't fully dark — is its penumbra Sun spots also have a penumbra, the outer edge that's not quite as dark as the center
Penumbra - definition of penumbra by The Free Dictionary
An area in which something exists to a lesser or uncertain degree: "The First Amendment has a penumbra where privacy is protected from governmental intrusion" (Joseph A Califano, Jr )

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