noun, plural spec·tra [spek-truh] /ˈspɛk trə/, spec·trums.
- an array of entities, as light waves or particles, ordered in accordance with the magnitudes of a common physical property, as wavelength or mass: often the band of colors produced when sunlight is passed through a prism, comprising red, orange, yellow, green, blue, indigo, and violet.
- this band or series of colors together with extensions at the ends that are not visible to the eye, but that can be studied by means of photography, heat effects, etc., and that are produced by the dispersion of radiant energy other than ordinary light rays.Compare band spectrum, electromagnetic spectrum, mass spectrum.
Origin of spectrum
Examples from the Web for spectrum
On the other end of the spectrum, there lies an artist like Lena Dunham, who engages in a flaunting of the flawed self.Daphne Merkin on Lena Dunham, Book Criticism, and Self-Examination|Mindy Farabee|December 26, 2014|DAILY BEAST
Overall, Paris Magnum reaches both too widely and too thinly in trying to convey a sense of spectrum.
Today, Sunday, the cast will perform a softened, “autism-friendly” version of the production for those on the spectrum.
On the opposite end of the spectrum are two other standout works, which depict Mary as a loving, nurturing mother.
The new term denotes a spectrum of problem drinking that can range from mild to moderate to severe.Americans Drink Too Much, But We’re Not All Alcoholics|Gabrielle Glaser|November 25, 2014|DAILY BEAST
On this account it has been customary to say that the red end of the spectrum was the heating end.The Telephone|A. E. Dolbear
Ever since Newton's day it has been fashionable to speak of the spectrum as nature's chart of colors.Elementary Color|Milton Bradley
In subsequent chapters we shall have occasion to consider more fully these different types of spectrum.A Text-Book of Astronomy|George C. Comstock
He filled a glass tube with a solution of sulphate of quinine and then moved it through the spectrum, entering at the red ray.The White Spark|Orville Livingston Leach
It was based on the observed relation between the color of a star and the general character of its spectrum.
British Dictionary definitions for spectrum
noun plural -tra (-trə)
Word Origin for spectrum
Word Origin and History for spectrum
1610s, "apparition, specter," from Latin spectrum "appearance, image, apparition," from specere "to look at, view" (see scope (n.1)). Meaning "band of colors formed from a beam of light" first recorded 1670s.