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shield

Subject: Literature

A force field. 1930 E. E. Smith Skylark Three Amazing Stories (Aug.) 408/1 They have already brought knowledge of the metal of power and of the impenetrable shield to the ...

shield

shield   Quick reference

A Dictionary of Construction, Surveying and Civil Engineering (2 ed.)

Reference type:
Subject Reference
Current Version:
2020

... A protective...

shield

shield   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... The very old, rigid core of relatively stable rocks within a continent. See Stein (2003) Precamb. Res. 123, 1–2 on the formation of the Arabian-Nubian Shield , and Lidmar–Bergström (1995) Geomorph. 12, 1 on the Baltic Shield...

Shield

Shield   Reference library

Brewer's Dictionary of Phrase & Fable (19 ed.)

Reference type:
Subject Reference
Current Version:
2013

...custom, after a great victory, for the victorious general to hang his shield on a temple wall. Shield of David, The See star of david . Shield of expectation, The The perfectly plain shield given to a young warrior on his maiden campaign. As he achieved glory, his deeds were recorded or symbolized on it. Battersea shield See under battersea . Clang of shields, The See under clang . Desert Shield See under desert . Gold and silver shield, The See under gold . Human shield See under human...

shield

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A Dictionary of Geology and Earth Sciences (5 ed.)

Reference type:
Subject Reference
Current Version:
2020

... 1. A tunnel borer consisting of a conventional shield with thrust rams and erector system. The cutter head and support are inside the shield. This type of machine is usually employed in soils or variable materials, e.g. a sand–rock–gravel sequence. 2. See craton...

shield

shield   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018

... ( screen ) A barrier or enclosure that prevents or reduces the penetration of an electric or magnetic field into a particular region. ...

shield

shield n   Reference library

The Oxford Dictionary of Science Fiction

Reference type:
Subject Reference
Current Version:
2007

... n a force field . 1930 E. E. Smith Skylark Three Amazing Stories (Aug.) 408/1 They have already brought knowledge of the metal of power and of the impenetrable shield to the Central System, which is to be our base. 1962 P. Anderson Shield Fantastic Stories of Imagination (June) 62/2 His kinetic energy had been absorbed, taken up by the field itself and shunted to the power pack. As for the noise, none could penetrate the shield. 1963 F. Herbert Dune Analog Sci. Fact–SF (Dec.) 33/2 “One must always remember that the shield turns the...

shield

shield   Quick reference

The Concise Oxford Dictionary of Archaeology (2 ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Archaeology, History
Length:
27 words

... [Ar] A piece of armour carried in the hand or on the arm, usually the left, to protect against and ward off blows from offensive...

shield

shield   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... In a nuclear power plant, a wall to protect people from exposure to harmful radiation...

shield boss

shield boss   Quick reference

The Concise Oxford Dictionary of Archaeology (2 ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Archaeology, History
Length:
79 words

... boss [Ar] A strengthened outward‐projecting cover at the centre of a shield behind which is the handle or grip used to hold the shield. The purpose of the boss is therefore to protect the hand of the person using the shield. Shield bosses are often of metal, even where the main structure of the shield is wood or leather. They are often decorated or ornamented. The shape and form of shield bosses are often chronologically and culturally...

heat shield

heat shield   Quick reference

A Dictionary of Space Exploration (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

...heat shield Any heat-protecting coating or system, such as an ablation shield , which protects spacecraft from the heat of re-entry , when temperatures can reach 1 500...

shield volcano

shield volcano   Quick reference

A Dictionary of Astronomy (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

... volcano A wide volcano, usually several kilometres in diameter, with gentle slopes, formed from solidified layers of very fluid basaltic lava. Typical examples on Earth are the Hawaiian volcanoes Kilauea and Mauna Loa, which have slopes of 4–10°. Lunar domes appear to be similar to shield volcanoes, and many shield volcanoes are found on...

Whipple shield

Whipple shield   Quick reference

A Dictionary of Space Exploration (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

...Whipple shield A device for protecting spacecraft against high-speed impacts by debris. A Whipple shield, also known as a bumper shield, consists of an outer skin of metal around a spacecraft which will vaporize dust particles before they reach the craft itself. The shield and spacecraft are separated by a gap called a standoff. In a ‘stuffed’ Whipple shield, the gap can be filled with blankets of ceramic cloth and other toughened materials as used in bullet-proof vests to increase protection against larger impacts. Such shields are named after the American...

face shield

face shield   Quick reference

A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
33 words
Illustration(s):
1

...shield n. A transparent barrier extending from the forehead to the chin protecting the face and eyes from aerosols , spatter, and debris generated particularly by ultrasonic scalers and high-speed turbines . Face ...

solar shield

solar shield   Quick reference

A Dictionary of Space Exploration (3 ed.)

Reference type:
Subject Reference
Current Version:
2018

...solar shield A component of a spacecraft that protects the craft against the heat and radiation of the Sun or shields a spacecraft's instruments, such as a telescope, from the Sun's bright...

shield law

shield law   Quick reference

A Dictionary of Journalism

Reference type:
Subject Reference
Current Version:
2014
Subject:
Media studies
Length:
37 words

...shield law Legislation that may prevent a journalist from being compelled to reveal the identity of a source who has been promised confidentiality. Such shield laws operate in most US states. See also anonymous source ; whistleblower...

radial shield

radial shield   Quick reference

A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
19 words

...shield In some brittle-stars ( see Phrynophiurida ), pairs of large plates, positioned radially, that surround the mouth....

biological shield

biological shield   Quick reference

A Dictionary of Construction, Surveying and Civil Engineering (2 ed.)

Reference type:
Subject Reference
Current Version:
2020

...shield A large mass of material (such as concrete) placed around a nuclear reactor to reduce the release of...

Shield-raising

Shield-raising   Reference library

The Oxford Dictionary of Byzantium

Reference type:
Subject Reference
Current Version:
2005
Subject:
History, Early history (500 CE to 1500)
Length:
218 words

...-raising , a military ceremony of imperial accession. Byz. borrowed it from Germanic custom when Western troops raised Julian on a shield during his acclamation at Paris ( 361 ). Shield-raising featured regularly in accessions down to Phokas and may have connoted solar symbolism (E.H. Kantorowicz, DOP 17 [ 1963 ] 119–77). The sources mention no further shield-raising during coronations until the 13th C., except the usurpations of Peter Deljan and Leo Tornikios . Constantine VII ( De adm. imp . 38.51–53) considered it a Khazar custom, yet...

shield volcano

shield volcano   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... volcano A volcano formed of successive eruptions of free-flowing lava which create a gently sloping, broad dome tens of kilometres across and more than one kilometre high. Mount Mazama, Oregon, is composed of several overlapping composite and shield volcanoes ( Bacon and Lanphere (2006) GSA Bull. 118, 11...

human shield

human shield   Quick reference

A Dictionary of Law Enforcement (2 ed.)

Reference type:
Subject Reference
Current Version:
2015
Subject:
Law
Length:
66 words

...shield The use of civilians or prisoners of war to deter an enemy from attacking certain targets. It is an offence under the Statute of the International Criminal Court to use civilians and other protected persons as human shields. Such offences were committed in Yugoslavia and in Iraq where the army put civilians onto military and government buildings to prevent them being...

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