spectrum

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spec·trum

 (spĕk′trəm)
n. pl. spec·tra (-trə) or spec·trums
1. Physics
a. The entire range over which some measurable property of a physical system or phenomenon can vary, such as the frequency of sound, the wavelength of electromagnetic radiation, or the mass of specific kinds of particles.
b. A specific portion of such a range: the infrared spectrum.
c. A characteristic distribution of phenomena manifested over such a range: the emission spectrum for sodium vapor.
d. A graphic representation of such a distribution; a spectrogram.
e. A band of colors produced when the wavelengths making up white light are separated, as when light passes through a prism or strikes drops of water.
2. A range of radio frequencies assigned by a regulatory agency for use by a given group or organization.
3.
a. A range of values of a quantity or set of related quantities: the income spectrum.
b. A sequence or range of related qualities, ideas, activities, entities, or phenomena: the whole spectrum of 20th-century thought; the spectrum of genes involved in the immune response.
Idiom:
on the spectrum
Having a form of autism spectrum disorder: students who are on the spectrum.

[Latin, appearance, from specere, to look at; see spek- in Indo-European roots.]

spectrum

(ˈspɛktrəm)
n, pl -tra (-trə)
1. (General Physics) the distribution of colours produced when white light is dispersed by a prism or diffraction grating. There is a continuous change in wavelength from red, the longest wavelength, to violet, the shortest. Seven colours are usually distinguished: violet, indigo, blue, green, yellow, orange, and red
2. (General Physics) the whole range of electromagnetic radiation with respect to its wavelength or frequency
3. (General Physics) any particular distribution of electromagnetic radiation often showing lines or bands characteristic of the substance emitting the radiation or absorbing it. See also absorption spectrum, emission spectrum
4. (General Physics) any similar distribution or record of the energies, velocities, masses, etc, of atoms, ions, electrons, etc: a mass spectrum.
5. any range or scale, as of capabilities, emotions, or moods
6. (Physiology) another name for an afterimage
[C17: from Latin: appearance, image, from spectāre to observe, from specere to look at]

spec•trum

(ˈspɛk trəm)

n., pl. -tra (-trə), -trums.
1.
a. an array of entities, as light waves or particles, ordered in accordance with the magnitudes of a common physical property, as wavelength or mass.
b. the band or series of colors, together with invisible extensions, produced by dispersion of radiant energy, as by a prism.
2. a broad range of varied but related ideas, objects, etc., that form a continuous series or sequence: the spectrum of political beliefs.
[1605–15; < Latin: appearance, form <spec(ere) to look, regard]

spec·trum

(spĕk′trəm)
Plural spectra (spĕk′trə) or spectrums
1. An arrangement of electromagnetic radiation by frequency and wavelength. As a whole, the electromagnetic spectrum ranges from radio waves to gamma rays. The visible spectrum is a band of colors seen when white light is broken up according to wavelengths, as when passing through a prism or striking water drops and producing a rainbow.
2. A distribution of charged atomic or subatomic particles arranged in order of masses, especially when arranged by a mass spectroscope.

spectrum

A band of electromagnetic radiation with components separated into their relative wavelengths.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spectrum - an ordered array of the components of an emission or wavespectrum - an ordered array of the components of an emission or wave
spectrum line - an isolated component of a spectrum formed by radiation at a uniform frequency
array - an orderly arrangement; "an array of troops in battle order"
absorption spectrum - the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
action spectrum - the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation
atomic spectrum - (physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element
electromagnetic spectrum - the entire frequency range of electromagnetic waves
emission spectrum - spectrum of electromagnetic radiation emitted by a self-luminous source
infrared spectrum - the spectrum of infrared radiation
line spectrum - a spectrum in which energy is concentrated at particular wavelengths; produced by excited atoms and ions as they fall back to a lower energy level
mass spectrum - a distribution of ions as shown by a mass spectrograph or a mass spectrometer
microwave spectrum - the part of the electromagnetic spectrum corresponding to microwaves
radio spectrum, radio-frequency spectrum - the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television
acoustic spectrum, sound spectrum - the distribution of energy as a function of frequency for a particular sound source
ultraviolet spectrum - the spectrum of ultraviolet radiation
color spectrum, visible spectrum - the distribution of colors produced when light is dispersed by a prism
2.spectrum - a broad range of related objects or values or qualities or ideas or activities
ambit, range, scope, reach, compass, orbit - an area in which something acts or operates or has power or control: "the range of a supersonic jet"; "a piano has a greater range than the human voice"; "the ambit of municipal legislation"; "within the compass of this article"; "within the scope of an investigation"; "outside the reach of the law"; "in the political orbit of a world power"

spectrum

noun range, variety, assortment, series, selection, gamut a wide spectrum of problems
Translations
سِلْسِلَه، نِطاقطَيْفنِطاق طَيْف الإشْعاعنِطاق مَوجات الصَّوْت
spektrumrejstřík
registerspektrum
hangszínképspektrumszínkép
hljóîróflitróflitróf, skalisÿnilegt litróf
スペクトル分光特性
gamaspektras
apjomsdiapazonsgammaspektrs
spectru
spektrum
dalga kuşağıdizitayfyelpaze

spectrum

[ˈspektrəm]
A. N (spectra (pl)) [ˈspektrə]
1. (= range) → espectro m, gama f
we went through the whole spectrum of emotionsexperimentamos todo el espectro or toda la gama de emociones posibles
a wide spectrum of opinionsun amplio espectro or abanico de opiniones, una amplia gama de opiniones
the political spectrumel espectro político
2. (Phys) → espectro m
B. CPD spectrum analysis Nanálisis m inv espectral

spectrum

[ˈspɛktrəm] [spectra] [ˈspɛktrə] (pl) n
[colours] → spectre m
(PHYSICS)spectre m
sound spectrum → spectre sonore
light spectrum → spectre lumineux
(= range) [opinions, experiences, emotions] → éventail m
at the other end of the spectrum, on the other side of the spectrum → de l'autre côté du spectre
across the social spectrum → dans tous les milieux sociaux
the political spectrum → le spectre politique
at both ends of the political spectrum → de part et d'autre du spectre politique

spectrum

n pl <spectra> → Spektrum nt; (fig: = range also) → Palette f, → Skala f; spectrum analysisSpektralanalyse f

spectrum

[ˈspɛktrəm] n (spectra (pl)) (Phys) → spettro (fig) → gamma

spectrum

(ˈspektrəm) plurals ˈspectrums ~ˈspectra (-trə) noun
1. the visible spectrum.
2. the full range (of something). The actress's voice was capable of expressing the whole spectrum of emotion.
3. the entire range of radiation of different wavelengths, part of which (the visible spectrum) is normally visible to the naked eye.
4. a similar range of frequencies of sound (the sound spectrum).

spec·trum

n. espectro.
1. amplitud en la actividad de un antibiótico contra variedades de microorganismos;
2. serie de imágenes que resultan de la refracción de radiación electromagnética;
3. banda matizada de rayos solares discernibles a simple vista o con un instrumento sensitivo.

spectrum

n (pl -tra) espectro
References in periodicals archive ?
Meropenem has the broadest antibacterial spectrum of any p-lactam agent available and has greater intrinsic activity in vitro against clinical isolates of P.
Entitled, "The unusual antibacterial activity of medical-grade Leptospermum honey: antibacterial spectrum, resistance and transcriptome analysis," the report describes the palliative effects of Leptospermum honey.
Novexel is very pleased to conclude this transaction with Forest Laboratories which will combine the potent beta lactamase inhibition of NXL104 with the antibacterial spectrum of ceftaroline," said Iain Buchanan, Chief Executive Officer of Novexel.
Finibax, which was initially launched in September 2005, has a wide antibacterial spectrum.