• Webster's Revised Unabridged Dictionary
    • a Supracretaceous (Geol) Lying above the chalk; Supercretaceous.
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Century Dictionary and Cyclopedia
    • supracretaceous In geology, overlying the Cretaceous series, or more recent than that: noting rocks, including those of the Tertiary, Post-tertiary, and recent formations or groups. Also supercretaceous.
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Chambers's Twentieth Century Dictionary
    • adj Supracretaceous sū-pra-krē-tā′shus (geol.) denoting strata lying above the chalk.
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In literature:

Supracretaceous, term explained, 103.
"A Manual of Elementary Geology" by Charles Lyell