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Comprehensive
Dictionary Suite
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calcareous of, containing, or resembling calcium carbonate; chalky.
foraminifer any of several single-celled marine organisms that have chalky cells perforated by tiny pores through which thin pseudopods protrude, and that form the chief component of chalk.
loess a fine-grained chalky soil, usu. yellowish brown or gray, believed to consist of windblown dust.