spectrum

spectrum
[[t]spe̱ktrəm[/t]]
spectra, spectrums (plural)
1) N-SING: the N The spectrum is the range of different colours which is produced when light passes through a glass prism or through a drop of water. A rainbow shows the colours in the spectrum.
2) N-COUNT: usu sing, with supp A spectrum is a range of a particular type of thing.

She'd seen his moods range across the emotional spectrum...

Politicians across the political spectrum have denounced the act...

The term `special needs' covers a wide spectrum of problems.

3) N-COUNT A spectrum is a range of light waves or radio waves within particular frequencies.

Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space...

The individual colours within the light spectrum are believed to have an effect on health.

...the ultraviolet spectra of hot stars.


English dictionary. 2008.

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  • Spectrum — Spec trum, n.; pl. {Spectra}. [L. See {Specter}.] 1. An apparition; a specter. [Obs.] [1913 Webster] 2. (Opt.) (a) The several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed… …   The Collaborative International Dictionary of English

  • Spectrum 7 — was an oil company started by William DeWitt and Mercer Reynolds.In 1984, Spectrum 7 merged with George W. Bush s Arbusto Energy. After the merger, Bush became the Chairman and CEO of Spectrum 7.In 1986, after reporting a net loss of $1.5 million …   Wikipedia

  • spectrum — UK US /ˈspektrəm/ noun [C] ► a range of similar things: a spectrum of sth »A methodology will have to be developed to gradually cover the entire spectrum of technologies. »a wide/broad spectrum the economic/business/political spectrum »He has… …   Financial and business terms

  • spectrum — [spek′trəm] n. pl. spectra [spek′trə] or spectrums [ModL, special use (by NEWTON2 Sir Isaac, 1671) of L spectrum: see SPECTER] 1. the series of colored bands dispersed and arranged in the order of their respective wavelengths by the passage of… …   English World dictionary

  • Spectrum — puede referirse a: Sinclair ZX Spectrum, popular ordenador de 8 bits; The Spectrum, pabellón deportivo de la ciudad de Filadelfia. Esta página de desambiguación cataloga artículos relacionados con el mismo título. Si llegaste aquí a través de …   Wikipedia Español

  • spectrum — (n.) 1610s, apparition, specter, from L. spectrum appearance, image, apparition, from specere to look at, view (see SCOPE (Cf. scope) (1)). Meaning band of colors formed from a beam of light first recorded 1670s …   Etymology dictionary

  • spectrum — ► NOUN (pl. spectra) 1) a band of colours produced by separation of the components of light by their different degrees of refraction, e.g. in a rainbow. 2) the entire range of wavelengths of electromagnetic radiation. 3) a characteristic series… …   English terms dictionary

  • Spectrum [1] — Spectrum (lat.), 1) Gestalt, Bild; 2) Gespenst; 3) (S. oculare), Augentäuschung (sd. 2); 4) eine begrenzte Stelle im Raume od. auf einer Fläche, in welcher Strahlen von verschiedener Brechbarkeit (beim Licht also von verschiedener Farbe) neben… …   Pierer's Universal-Lexikon

  • Spectrum [2] — Spectrum, 1) eine Art Zackenschwärmer; 2) so v.w. Gespenstheuschrecke …   Pierer's Universal-Lexikon

  • Spectrum — Spectrum, lat., Bild, Gespenst; in der Physik eine begränzte Stelle in der Luft oder auf einer Fläche, auf der sich ein strahlendes Fluidum (Licht, Wärme) gleichsam abbildet …   Herders Conversations-Lexikon

  • spectrum — has the plural form spectra …   Modern English usage

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