Having the nature or composition of calcite; characterized by or containing calcite minerals.
From 'calcite' + the Latin suffix '-aceous' (having the nature of). This rare adjective emerged in geological and mineralogical texts of the 19th century.
This word is so specialized that even geology professors might pause—it's basically the fancy way of saying 'made mostly of calcite,' and it shows how scientists create precise terms for rock properties!
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