spectrum

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[edit] English

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[edit] Pronunciation

[edit] Noun

Singular
spectrum

Plural
spectra or spectrums

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.
  3. (chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
  4. (linear algebra) Of a bounded linear operator A, the scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse.

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[edit] Latin

[edit] Noun

spectrum (genitive spectrī); n, second declension

  1. a specter

[edit] Inflection

Number Singular Plural
nominative spectrum spectra
genitive spectrī spectrōrum
dative spectrō spectrīs
accusative spectrum spectra
ablative spectrō spectrīs
vocative spectrum spectra

[edit] Descendants