shield

shield
   ; cave shield
   1. A thin circular disc of calcite projecting from a cave wall at any upward inclination, commonly a meter or more in diameter and with the underside draped with stalactites and curtains. The shield is actually a double disc with a thin central crack that acts as the continuation of a wallrock fracture. It grows by water moving up the crack under pressure and depositing calcite on both sides of its outer rim. Shields are rare, but Lehman Cave, Nevada, has more than a hundred of them [9].
   2. A disk-shaped speleothem standing edgewise at a high angle [10].
   3. A geologically stable and undisturbed continental block [16].

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

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  • SHIELD — Personnage de fiction Activité(s) Agence gouvernementale Adresse Héliporteur (Helicarrier) …   Wikipédia en Français

  • shield´er — shield «sheeld», noun, verb. –n. 1. a piece of armor carried on the arm or in the hand to protect the body in battle, used in ancient and medieval warfare. 2. anything used to protect: »He turned up his collar as a shield against the cold wind. A …   Useful english dictionary

  • Shield — Shield, v. t. [imp. & p. p. {Shielded}; p. pr. & vb. n. {Shielding}.] [AS. scidan, scyldan. See {Shield}, n.] 1. To cover with, or as with, a shield; to cover from danger; to defend; to protect from assault or injury. [1913 Webster] Shouts of… …   The Collaborative International Dictionary of English

  • Shield — Shield, n. [OE. sheld, scheld, AS. scield, scild, sceld, scyld; akin to OS. scild, OFries. skeld, D. & G. schild, OHG. scilt, Icel. skj[ o]ldr, Sw. sk[ o]ld, Dan. skiold, Goth. skildus; of uncertain origin. Cf. {Sheldrake}.] 1. A broad piece of… …   The Collaborative International Dictionary of English

  • shield — [shēld] n. [ME schelde < OE scield, akin to Ger schild < Gmc * skild < IE base * (s)kel > SHELF] 1. a flat, usually broad, piece of metal, wood, etc., carried in the hand or worn on the forearm to ward off blows or missiles 2. any… …   English World dictionary

  • Shield — steht für The Shield – Gesetz der Gewalt, eine US amerikanische Krimiserie Mark Shield (* 1973), ein australischer Fußballschiedsrichter William Shield (1748 1829), englischer Komponist Diese Seite ist eine Begriffsklärun …   Deutsch Wikipedia

  • shield — [n] protection absorber, aegis, armament, armor, buckler, buffer, bulwark, bumper, cover, defense, escutcheon, guard, mail, rampart, safeguard, screen, security, shelter, ward; concepts 712,729 shield [v] protect bulwark, chamber, conceal, cover …   New thesaurus

  • shield — ► NOUN 1) a broad piece of armour held for protection against blows or missiles. 2) a sporting trophy consisting of an engraved metal plate mounted on a piece of wood. 3) Heraldry a stylized representation of a shield used for displaying a coat… …   English terms dictionary

  • Shield — См. Защитный экран Термины атомной энергетики. Концерн Росэнергоатом, 2010 …   Термины атомной энергетики

  • shield — I noun aegis, buckler, buffer, bulwark, clipeus, cover, covert, coverture, defense, guard, protection, protector, rampart, refuge, safeguard, sanctuary, screen, scutum, security, shelter II index blind (obscure) …   Law dictionary

  • shield — vb protect, guard, safeguard, *defend Analogous words: preserve, conserve, *save: *harbor, shelter, lodge, house …   New Dictionary of Synonyms

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