different between spectrum vs ultrawideband

English

Etymology

From Latin spectrum (“appearance, image, apparition”), from speci? (“look at, view”). Doublet of specter. See also scope.

Pronunciation

• (Canada, UK) IPA^(key): /?spekt??m/
• (US) IPA^(key): /?sp?kt(?)??m/
• Rhymes: -?kt??m

Noun

spectrum (plural spectra or spectrums)

1. A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
2. 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.

3. (psychology, education) The autism spectrum.
4. (chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
5. (mathematics, linear algebra) The set of eigenvalues of a matrix.
6. (mathematics, functional analysis) Of a bounded linear operator A, the set of scalar values ? such that the operator A—?I, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.
7. (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

8. (obsolete) Specter, apparition. [from early 17th c.]
9. The image of something seen that persists after the eyes are closed.

Derived terms

• cepstrum
• light spectrum
• spectro-
• spectrum disorder
• political spectrum

Related terms

• spectral

Translations

Anagrams

• cepstrum, crumpets

Dutch

Etymology

From Latin spectrum (“appearance, image, apparition”), from speci? (“look at, view”).

Pronunciation

Noun

spectrum n (plural spectrums or spectra, diminutive spectrumpje n)

1. spectrum

Derived terms

• spectraal
• spectroscoop

Latin

Etymology

From spec(i?) (“look at, behold”) +? -trum. Confer with speculum.

Pronunciation

• (Classical) IPA^(key): /?spek.trum/, [?s?p?kt?????]
• (Ecclesiastical) IPA^(key): /?spek.trum/, [?sp?kt??um]

Noun

spectrum n (genitive spectr?); second declension

1. appearance, image
2. apparition, specter

Declension

Second-declension noun (neuter).

Related terms

• speci?
• specti?
• spect?

Descendants

• Catalan: espectre
• Dutch: spectrum
• English: spectre, specter; spectrum
• French: spectre
• German: Spektrum
• Irish: speictream
• Italian: spettro
• Portuguese: espectro
• Romanian: spectru
• Russian: ?????? (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, 1883–1887)
• spectrum in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette

English

Alternative forms

• ultra-wideband

Etymology

ultra- +? wideband

Adjective

ultrawideband (not comparable) (Abbreviated as: UWB)

1. Describing a radio technology that uses a large portion of the radio spectrum

Related terms

• hyperband
• wideband
• narrowband
• baseband
• broadband
• band