Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

An array of the components of an emission or wave separated and arranged in the order of some varying characteristic (as wavelength, mass, or energy). (plural)

Usage examples (40)
  • Noun, : the spectrum of political beliefs
  • The plans spectra& spectra plus offer global life insurance coverage and global payout.
  • But at distances of many light years the signals, from light wavelength patterns called spectra, are very faint and difficult to read.
  • The characteristic feature of their spectra is the strength and breadth of the hydrogen lines and the extreme faintness of the metallic lines. for more
Tutoring comment

Tutoring comment not yet available...

add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.