spectrum
English
Etymology
From Latin spectrum (“appearance, image, apparition”), from speciō (“look at, view”). Doublet of specter. See also scope.
Pronunciation
- Lua error in Module:parameters at line 331: Parameter 1 should be a valid language or etymology language code; the value "Canada" is not valid. See WT:LOL and WT:LOL/E. IPA(key): /ˈspektɹəm/
- Lua error in Module:parameters at line 331: Parameter 1 should be a valid language or etymology language code; the value "US" is not valid. See WT:LOL and WT:LOL/E. IPA(key): /ˈspɛkt(ʃ)ɹəm/
- Rhymes: -ɛktɹəm
Noun
spectrum (plural spectra or spectrums)
- A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
- 2012 November 7, Matt Bai, “Winning a Second Term, Obama Will Confront Familiar Headwinds”, in New York Times[1]:
- As Mr. Obama prepared to take the oath, his approval rating touched a remarkable 70 percent in some polling — a reflection of good will across the political spectrum.
- Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc. [from later 17th c.]
- 2010 October 30, Jim Giles, Jammed!, in New Scientist,
- Current 3G technologies can send roughly 1 bit of data - a one or a zero - per second over each 1 Hz of spectrum that the operator owns.
- 2010 October 30, Jim Giles, Jammed!, in New Scientist,
- (psychology, education) The autism spectrum.
- (chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
- (mathematics, linear algebra) The set of eigenvalues of a matrix.
- (mathematics, functional analysis) Of a bounded linear operator A, the set of scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.
- (abstract algebra, algebraic geometry) The set, denoted Spec(R), of all prime ideals of a given ring R, commonly augmented with a Zariski topology and considered as a topological space.
- Hyponym: Stone space
- (obsolete) Specter, apparition. [from early 17th c.]
- The image of something seen that persists after the eyes are closed.
Derived terms
Related terms
Translations
range
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range of colors
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chemistry: a pattern of absorption or emission of radiation
linear algebra: set of scalar values
- The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.
Translations to be checked
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Anagrams
Dutch
Etymology
From Latin spectrum (“appearance, image, apparition”), from speciō (“look at, view”).
Pronunciation
Audio: (file)
Noun
spectrum n (plural spectrums or spectra, diminutive spectrumpje n)
Derived terms
Latin
Etymology
From spec(iō) (“look at, behold”) + -trum. Confer with speculum.
Pronunciation
- (Classical Latin) IPA(key): /ˈspek.trum/, [ˈs̠pɛkt̪rʊ̃ˑ]
- (modern Italianate Ecclesiastical) IPA(key): /ˈspek.trum/, [ˈspɛkt̪rum]
Noun
spectrum n (genitive spectrī); second declension
Declension
Second-declension noun (neuter).
Case | Singular | Plural |
---|---|---|
Nominative | spectrum | spectra |
Genitive | spectrī | spectrōrum |
Dative | spectrō | spectrīs |
Accusative | spectrum | spectra |
Ablative | spectrō | spectrīs |
Vocative | spectrum | spectra |
Related terms
Descendants
- Catalan: espectre
- Dutch: spectrum
- English: spectre, specter; spectrum
- French: spectre
- German: Spektrum
- Irish: speictream
- Italian: spettro
- Portuguese: espectro
- Romanian: spectru
- Russian: спектр (spektr)
- Spanish: espectro
- Swedish: spektrum
References
- “spectrum”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- “spectrum”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
- spectrum in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
- spectrum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
Categories:
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- English terms derived from Latin
- English doublets
- English 2-syllable words
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- Rhymes:English/ɛktɹəm
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- en:Psychology
- en:Education
- en:Chemistry
- en:Mathematics
- en:Linear algebra
- en:Functional analysis
- en:Algebraic geometry
- English terms with obsolete senses
- English terms derived from the PIE root *speḱ-
- en:Energy
- Dutch terms borrowed from Latin
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