Dictionary

spectrum en · NOUN

Pronunciation

[ˈspɛktɹ̝̊əm] ~ [ˈspɛktɹ̝̊m̩]
/ˈspɛktɹəm/
(Mid-Atlantic, US) audio
[ˈspɛkt̠ɹ̠̊˔əm] ~ [ˈspɛkt̠ɹ̠̊˔m̩]
(Southern-England) audio

Etymology

Etymology tree Proto-Indo-European *speḱ- Proto-Indo-European *-yeti Proto-Indo-European *spéḱyeti Proto-Italic *spekjō Latin speciō Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Italic *-trom Latin -trum Latin spectrumbor. English spectrum From Latin spectrum (“appearance, image, apparition”), from speciō (“look at, view”). Doublet of specter. See also scope.

Meanings

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
- Near-synonyms: sliding scale, continuum
- 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. 2012 November 7, Matt Bai, “Winning a Second Term, Obama Will Confront Familiar Headwinds”, in New York Times:
Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.
- 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:
(usually, with the) The autism spectrum.
- He punctuated his words with a look into my eyes that might have been read as threatening or menacing by anyone who was not on the spectrum. But I am on the spectrum, and so I stared back at him. 2022, Percival Everett, Dr. No, Influx Press (2023), page 110:
A set of frequencies that are used for radio-frequency communication; not necessarily a continuous range.
The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
The set of eigenvalues of a matrix.
(qualifier: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.
(qualifier:commutative algebra) An abstract object in mathematics created from a commutative ring R and denoted operatorname Spec(R) or operatorname SpecR and said to be the spectrum of R; useful in the study of such rings for providing a geometric object which encodes many of the properties R, and in modern geometry for generalizing the notion of an algebraic variety to that of an affine scheme. Formally, the set of all prime ideals R equipped with the Zariski topology and augmented with a sheaf of rings called the structure sheaf, generated by the B-sheaf on the distinguished open sets D_f which assigns the localization of R at f to each set D_f, regarded as a ring of functions on D_f. See Spectrum of a ring on Wikipedia.Wikipedia
(obsolete) Specter, apparition.
The image of something seen that persists after the eyes are closed.

Forms

Spelling	Features	Labels	Source
spectrums	Number=Plur		lexicographic
spectra	Number=Plur		lexicographic

Translations (116)

ca espectre (range of colors) · pt espetro (range) · af spektrum (range of colors) · da spekter (range of colors) · sh спектар (range of colors) · ja スペクトル (chemistry: a pattern of absorption or emission of radiation) · el φωτόφασμα (range of colors) · fr spectre (range of colors) · sk spektrum (range of colors) · cs spektrum (range of colors) · eo spektro (range of colors) · de Spektrum (range of colors) · hak 光譜 /光谱 (range of colors) · vo späktrum (range of colors) · pt espectro (linear algebra: set of scalar values) · ja スペクトル (range) · mi tūāwhiorangi (chemistry: a pattern of absorption or emission of radiation) · ro spectru (range) · sv spektrum (range of colors) · pl widmo (linear algebra: set of scalar values) · et spekter (range of colors) · cmn 範圍 /范围 (range) · te వర్ణమాల (range of colors) · fi spektri (linear algebra: set of scalar values) · nl spectrum (range of colors) · lv spektrs (range of colors) · pl widmo (range of colors) · he ספקטרום (range of colors) · fi kirjo (range) · fa طیف (range) · hu spektrum (range of colors) · vo kölaspäktrum (range of colors) · sl spekter (range of colors) · pt espetro (range of colors) · ka სპექტრი (range of colors) · nn spekter (range of colors) · bg спектър (chemistry: a pattern of absorption or emission of radiation) · yue 光譜 /光谱 (range of colors) · da spektrum (range of colors) · ka სპექტრი (range) · pl spektrum autyzmu (psychology: the autism spectrum) · kmr şebeng (range of colors) · sq spektri (range of colors) · bg спектър (range of colors) · bg спектър (range) · el φάσμα (range of colors) · gl espectro (range of colors) · uk спектр (range) · tl balangaw (range of colors) · de Spektrum (chemistry: a pattern of absorption or emission of radiation) · th สเปกตรัม (range of colors) · el φάσμα (linear algebra: set of scalar values) · cmn 譜系 /谱系 (psychology: the autism spectrum) · fi kirjo (range of colors) · ga speictream (range) · hu színkép (range of colors) · pt espectro (chemistry: a pattern of absorption or emission of radiation) · pl spektrum (range of colors) · ru диапазо́н (range) · el φάσμα (range) · ga speictream (chemistry: a pattern of absorption or emission of radiation) · it spettro (linear algebra: set of scalar values) · ru спектр (range) · be спектр (range) · eu espektro (range of colors) · fi spektri (range of colors) · pl widmo optyczne (range of colors) · pt espectro (range of colors) · ga speictream (range of colors) · km ស្ប៊ិច (chemistry: a pattern of absorption or emission of radiation) · ar طَيْف (range of colors) · de Spektrum (linear algebra: set of scalar values) · cmn 光譜 /光谱 (range of colors) · sh spektar (range of colors) · tr tayf (range of colors) · ja スペクトル (linear algebra: set of scalar values) · fr spectre (range) · el φάσμα (chemistry: a pattern of absorption or emission of radiation) · nn spektrum (range of colors) · ko 분광 (range of colors) · pt espectro (range) · ru спектр (linear algebra: set of scalar values) · mk спектар (range of colors) · fa بیناب (range of colors) · vi quang phổ (range of colors) · ga speictream (linear algebra: set of scalar values) · ro spectru (range of colors) · nb spekter (range of colors) · uk спектр (range of colors) · fr spectre (linear algebra: set of scalar values) · ja スペクトル (range of colors) · es espectro (range of colors) · bg спектър (psychology: the autism spectrum) · lt spektras (range of colors) · tl balangaw (range) · ru спектр (range of colors) · hy սպեկտր (range of colors) · fa بیناب (chemistry: a pattern of absorption or emission of radiation) · ro spectru (linear algebra: set of scalar values) · fi spektri (chemistry: a pattern of absorption or emission of radiation) · th สเปกตรัม (range) · pt espetro (linear algebra: set of scalar values) · ko 스펙트럼 (range) · fa طیف (range of colors) · fr spectre (chemistry: a pattern of absorption or emission of radiation) · mi tūāwhiorangi (range of colors) · ja 分光 (range of colors) · pl spektrum (range) · bg спектър (linear algebra: set of scalar values) · it spettro (range of colors) · nb spektrum (range of colors) · es espectro (range) · pt espetro (chemistry: a pattern of absorption or emission of radiation) · it spettro (range) · pl spektrum (chemistry: a pattern of absorption or emission of radiation) · es espectro (psychology: the autism spectrum)

spectrum en · NOUN

Pronunciation

Etymology

Meanings

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Translations (116)