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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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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〕
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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 Learn how our latest innovations are transforming patient care Penumbra’s commitment to saving patient lives is chief among our values
Umbra, penumbra and antumbra - Wikipedia
The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object of lesser size In cases of equal or smaller impinging objects, only an umbra and penumba are generated
PENUMBRA Definition Meaning - Merriam-Webster
The meaning of PENUMBRA is a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light How to use penumbra in a sentence Did you know?
PENUMBRA | English meaning - Cambridge Dictionary
PENUMBRA definition: 1 a part of a shadow in which only some of the light is blocked, used especially about a shadow… Learn more
PENUMBRA Definition Meaning | Dictionary. com
Penumbra definition: 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 See examples of PENUMBRA used in a sentence
What does Penumbra mean? - Definitions. net
Penumbra is a term used in astronomy and physics to refer to the partially shaded outer region of the shadow cast by an opaque object It is also used to refer to the area in which only a portion of the light source is obscured More generally, it can refer to a surrounding area that is less prominent or less illuminated
Penumbra - definition of penumbra by The Free Dictionary
A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination 2 The diffuse outer part of a sunspot 3 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 ) 4
Careers | Penumbra Inc
Join our purpose-driven team and help shape the future of healthcare Penumbra’s products are transforming health care Whether you are monitoring a clinical trial, designing the next breakthrough medical device, or building prototypes in the lab, saving lives is our top priority
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
Penumbra (medical company) - Wikipedia
Penumbra, Inc is an American medical device company headquartered in Alameda, California [1] [2] [3] [4] The company was founded by Arani Bose and Adam Elsesser in 2004 [5] It manufactures devices for interventional therapies to treat vascular conditions such as stroke and aneurysm [6]

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