chromospherePronunciation: /ˈkrəʊməsfɪə/Definition of chromosphere noun Astronomy a reddish gaseous layer immediately above the photosphere of the sun or another star which, together with the corona, constitutes its outer atmosphere. Derivatives chromosphericPronunciation: /-ˈsfɛrɪk/ adjective Origin: mid 19th century: from chromo-2 'colour' + spherechromosphere in other Oxford dictionaries Definition of chromosphere in the US English dictionary
