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Definitions

spectra

[spek-truh] / ˈspɛk trə /
NOUN
color spectrum
Synonyms




Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The spectra revealed multiple metals -- elements heavier than helium -- mixed into the gas.

From Science Daily • Jan. 24, 2026

The spectra of the little red dots differed significantly from known dust-reddened active galactic nuclei.

From Science Daily • Nov. 29, 2025

Balmer breaks can appear in the spectra of single, very hot, young stars, as well as in galaxies containing many such stars.

From Science Daily • Nov. 29, 2025

When the object was first identified in 2018, spectra obtained with the 200-inch Hale Telescope at Palomar Observatory showed no special features.

From Science Daily • Nov. 7, 2025

Some scientists think that when expansion is followed by contraction, when the spectra of distant galaxies are all blue-shifted, causality will be inverted and effects will precede causes.

From "Cosmos" by Carl Sagan