spectra
UKUS
TOEFLA2
Definitions
n.
Plural of spectrum: two or more ordered ranges of light, frequencies, or other components.
spectrum 的复数：两条或更多的光谱、频谱或有序成分范围。
Root Breakdown
Root-derivedThe Latin-style plural of spectrum (like phenomenon → phenomena). Used in scientific writing for multiple spectra; the regular plural 'spectrums' also exists but is less common in technical contexts.
Root spectr still carries 3 more wordsUsage Guide
spectra is the standard plural in science (absorption spectra, emission spectra). The anglicized plural 'spectrums' is acceptable in general English but rare in technical writing. It is a plural noun — always takes a plural verb: 'the spectra show...'
Example Sentences
- 1.
The team compared the emission spectra of several distant galaxies.
- 2.
Different elements produce distinct line spectra.