Heavy metals

Heavy metals
  Metallic elements, including those required for plant and animal nutrition, in trace concentration but which become toxic at higher concentrations. Examples are mercury, chromium, cadmium, and lead.
  U.S. Dept. of Energy, Energy Information Administration's Energy Glossary

Energy terms . 2014.

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  • Heavy metals — Heavy Heav y, a. [Compar. {Heavier}; superl. {Heaviest}.] [OE. hevi, AS. hefig, fr. hebban to lift, heave; akin to OHG. hebig, hevig, Icel. h[ o]figr, h[ o]fugr. See {Heave}.] 1. Heaved or lifted with labor; not light; weighty; ponderous; as, a… …   The Collaborative International Dictionary of English

  • Heavy metals — Metal Met al (? or ?; 277), n. [F. m[ e]tal, L. metallum metal, mine, Gr. ? mine; cf. Gr. ? to search after. Cf. {Mettle}, {Medal}.] 1. (Chem.) An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than …   The Collaborative International Dictionary of English

  • heavy metals — metals which are particularly heavy (i.e. iron, copper, etc.) …   English contemporary dictionary

  • heavy metals — Смотри тяжелые металлы …   Энциклопедический словарь по металлургии

  • Metals Treatment Technologies — (MT2) Type Private, LLC Industry Environmental Services, Firing Range Solutions Founded Aug. 4, 2000 …   Wikipedia

  • heavy metal — heavy metals 1) N UNCOUNT: oft N n Heavy metal is a type of very loud rock music with a fast beat. ...a German heavy metal band named The Scorpions. 2) N COUNT A heavy metal is a metallic element with a high density. Many heavy metals are… …   English dictionary

  • Heavy — Heav y, a. [Compar. {Heavier}; superl. {Heaviest}.] [OE. hevi, AS. hefig, fr. hebban to lift, heave; akin to OHG. hebig, hevig, Icel. h[ o]figr, h[ o]fugr. See {Heave}.] 1. Heaved or lifted with labor; not light; weighty; ponderous; as, a heavy… …   The Collaborative International Dictionary of English

  • Heavy artillery — Heavy Heav y, a. [Compar. {Heavier}; superl. {Heaviest}.] [OE. hevi, AS. hefig, fr. hebban to lift, heave; akin to OHG. hebig, hevig, Icel. h[ o]figr, h[ o]fugr. See {Heave}.] 1. Heaved or lifted with labor; not light; weighty; ponderous; as, a… …   The Collaborative International Dictionary of English

  • Heavy cavalry — Heavy Heav y, a. [Compar. {Heavier}; superl. {Heaviest}.] [OE. hevi, AS. hefig, fr. hebban to lift, heave; akin to OHG. hebig, hevig, Icel. h[ o]figr, h[ o]fugr. See {Heave}.] 1. Heaved or lifted with labor; not light; weighty; ponderous; as, a… …   The Collaborative International Dictionary of English

  • Heavy fire — Heavy Heav y, a. [Compar. {Heavier}; superl. {Heaviest}.] [OE. hevi, AS. hefig, fr. hebban to lift, heave; akin to OHG. hebig, hevig, Icel. h[ o]figr, h[ o]fugr. See {Heave}.] 1. Heaved or lifted with labor; not light; weighty; ponderous; as, a… …   The Collaborative International Dictionary of English

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