What does spectrum mean?

Definitions for spectrum
ˈspɛk trəmspec·trum

Here are all the possible meanings and translations of the word spectrum.

Princeton's WordNet

  1. spectrum(noun)

    an ordered array of the components of an emission or wave

  2. spectrum(noun)

    a broad range of related objects or values or qualities or ideas or activities

Wiktionary

  1. spectrum(Noun)

    Specter, apparition.

  2. spectrum(Noun)

    A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.

  3. spectrum(Noun)

    Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.

  4. spectrum(Noun)

    The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).

  5. spectrum(Noun)

    The set of eigenvalues of a matrix.

  6. spectrum(Noun)

    Of a bounded linear operator A, the set of scalar values u03BB such that the operator Au2014u03BBI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

  7. Origin: From spectrum, from specio. (see scope)

Webster Dictionary

  1. Spectrum(noun)

    an apparition; a specter

  2. Spectrum(noun)

    the several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope

  3. Spectrum(noun)

    a luminous appearance, or an image seen after the eye has been exposed to an intense light or a strongly illuminated object. When the object is colored, the image appears of the complementary color, as a green image seen after viewing a red wafer lying on white paper. Called also ocular spectrum

  4. Origin: [L. See Specter.]

Freebase

  1. Spectrum

    A spectrum is a condition that is not limited to a specific set of values but can vary infinitely within a continuum. The word saw its first scientific use within the field of optics to describe the rainbow of colors in visible light when separated using a prism; it has since been applied by analogy to many fields other than optics. Thus, one might talk about the spectrum of political opinion, or the spectrum of activity of a drug, or the autism spectrum. In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. In most modern usages of spectrum there is a unifying theme between extremes at either end. Some older usages of the word did not have a unifying theme, but they led to modern ones through a sequence of events set out below. Modern usages in mathematics did evolve from a unifying theme, but this may be difficult to recognize.

Chambers 20th Century Dictionary

  1. Spectrum

    spek′trum, n. the image of something seen continued after the eyes are closed: the colours of light separated by a prism, and exhibited as spread out on a screen:—pl. Spec′tra.—n. Spec′trograph, an apparatus for photographing a spectrum.—adjs. Spectrograph′ic, -al.—n. Spectrog′raphy, the art of using the spectrograph.—adj. Spectrolog′ical.—adv. Spectrolog′ically.—ns. Spectrol′ogy, the division of physical science that embraces spectrum analysis: demonology; Spectrom′eter, an instrument like a spectroscope, by means of which the angular deviation of a ray of light in passing through a prism can be accurately measured.—adj. Spectromet′ric.—n. Spec′trophōne, an adaptation of the spectroscope, in which, on the principle of the radiophone, perception of a succession of sounds takes the place of observation by the eye.—adj. Spectrophon′ic.—ns. Spec′tro-polar′iscope, a polariscope combined with a spectroscope; Spec′troscope, an instrument for forming and examining spectra of luminous bodies, so as to determine their composition.—adjs. Spectroscōp′ic, -al.—adv. Spectroscōp′ically.—ns. Spec′troscōpist, one skilled in spectroscopy; Spec′troscōpy, the use of the spectroscope and the study of spectrum analysis. [L.,—specĕre, to see.]

The Nuttall Encyclopedia

  1. Spectrum

    the name given to coloured and other rays of pure light separated by refraction in its transmission through a prism, as exhibited on a screen in a darkened chamber.

Dictionary of Nautical Terms

  1. spectrum

    The variously coloured image into which a ray of light is divided on being passed through a prism.

Suggested Resources

  1. spectrum

    Song lyrics by spectrum -- Explore a large variety of song lyrics performed by spectrum on the Lyrics.com website.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'spectrum' in Nouns Frequency: #1872

Anagrams for spectrum »

  1. cepstrum, crumpets

How to pronounce spectrum?

  1. Alex
    Alex
    US English
    Daniel
    Daniel
    British
    Karen
    Karen
    Australian
    Veena
    Veena
    Indian

How to say spectrum in sign language?

  1. spectrum

Numerology

  1. Chaldean Numerology

    The numerical value of spectrum in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of spectrum in Pythagorean Numerology is: 7

Examples of spectrum in a Sentence

  1. Roula Choueiri:

    It’s tremendous for autism spectrum disorder.

  2. Chief Executive Philippe Petitcolin:

    We have the whole spectrum of options available today.

  3. Gary Shamis:

    The entire dining spectrum has gone through a revolution.

  4. Finance Minister Wolfgang Schaeuble:

    I expect a stronger diversification (of the party spectrum).

  5. Deputy District Attorney Brenda Daly:

    He has shown such a spectrum of emotions that I try not to pay attention.

Images & Illustrations of spectrum

  1. spectrumspectrumspectrumspectrumspectrum

Popularity rank by frequency of use

spectrum#1#4483#10000

Translations for spectrum

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"spectrum." Definitions.net. STANDS4 LLC, 2019. Web. 15 Nov. 2019. <https://www.definitions.net/definition/spectrum>.

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