spectrum
Part of speech: noun
Morphological type: simple
Topics: algebraic-geometry
chemistry
education
geometry
human-sciences
linear-algebra
mathematics
natural-sciences
physical-sciences
psychology
sciences
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.
Inflected forms:
form: spectra
pos: noun
tags: plural
form: spectrums
pos: noun
tags: plural
Senses:
gloss: A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
pos: noun
examples: 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.
gloss: Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.
pos: noun
examples: 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.
gloss: The autism spectrum.
pos: noun
tags: usually
examples: 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.
gloss: The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
pos: noun
gloss: The set of eigenvalues of a matrix.
pos: noun
gloss: 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.
pos: noun
gloss: 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
pos: noun
gloss: Specter, apparition.
pos: noun
tags: obsolete
gloss: The image of something seen that persists after the eyes are closed.
pos: noun
Related words: spectral
Derived words: absorption spectrum
autism spectrum
autism spectrum disorder
autistic spectrum
autistic spectrum disorder
autospectrum
band spectrum
bispectrum
Bloch spectrum
broad-spectrum
broad-spectrum antibiotic
cepstrum
Eilenberg-MacLane spectrum
emission spectrum
fetal alcohol spectrum disorder
first-order spectrum
full-spectrum superiority
full spectrum superiority
hydrogen spectrum
light spectrum
line spectrum
mass spectrum
multispectrum
narrow-spectrum
nuclear spectrum
on the spectrum
optical spectrum
political spectrum
polyspectrum
pseudospectrum
schizophrenia spectrum
Spec-chum
spectro-
spectrum analyser
spectrum analyzer
spectrum disorder
spectrumy
spread spectrum communication
subspectrum
trispectrum
X-ray spectrum
Translations: