(a.) Having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk.

argent argentine branny canescent chalklike comminute comminuted cretaceous crushed detrital detrited disintegrated dusty efflorescent farinaceous fine flaky fleecy-white floury frosted frosty furfuraceous gone to dust grated grizzled grizzly ground hoar hoary impalpable lactescent levigated lily-white marble marmoreal mealy milky milled niveous pestled platinum powdered powdery pulverant pulverized pulverulent pure white reduced to powder scaly scobicular scobiform scurfy sharded shredded silver silvered silvery snow-white snowy swan-white triturated white white as snow