ˈīdōˌkrās, ˈid-, -āz noun
( -s )
Etymology: French, from Greek eidos form, shape + krasis mixture, from kerannynai to mix — more at idyll , crater
: a mineral Ca 10 (Mg,Fe) 2 Al 4 Si 9 O 34 (OH) 4 that is a complex silicate of calcium, magnesium, iron, and aluminum — called also vesuvianite