Learn how to say Spectrum correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word spectrum:
noun (plural spectra /-trə/ or spectrums)
1a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
(the spectrum) the entire range of wavelengths of electromagnetic radiation.
a characteristic series of frequencies of electromagnetic radiation emitted or absorbed by a substance.
the components of a sound or other phenomenon arranged according to such characteristics as frequency, charge, and energy.
2used to classify something in terms of its position on a scale between two extreme points:
the left or the right of the political spectrum
a wide range:
self-help books are covering a broader and broader spectrum
early 17th century (in the sense ‘spectre’): from Latin, literally ‘image, apparition’, from specere ‘to look’
Make the plural of spectrum by changing the -um ending to -a (as in Latin) or by adding an -s.