plural of spectrum

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.

(informal) Having an autism spectrum disorder or exhibiting traits pertaining to or within the autism spectrum.

plural of absorption spectrum

plural of light spectrum

plural of political spectrum

plural of optical spectrum

(physics) An electronic device that displays the frequency spectrum of an electrical, optical or acoustic waveform.

The colours of the rainbow. / (physics) The distribution of colours produced when white light passes through a prism. / (astronomy, physics) The range of frequencies of visible light.

(physics) The entire range of wavelengths of all known electromagnetic radiations extending from gamma rays, to X-rays through visible light, infrared, to radio waves.