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Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
polychromatic is an adjective meaning "(of light or other electromagnetic radiation) composed of more than one wavelength". It carries 2 recorded senses.
(of light or other electromagnetic radiation) composed of more than one wavelength
“polychromatic light”
having or exhibiting many colors
Definitions, synonyms and semantic relations for polychromatic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.