gypseous, a.
(ˈdʒɪpsɪəs)
[f. late L. gypse-us (f. gypsum) + -ous. Cf. gypsous.]
1. Resembling or having the qualities of gypsum.
| 1661 Lovell Hist. Anim. & Min. 437 Of phlegme... If gypseous, by nodous swellings. 1710 T. Fuller Pharm. Extemp. 278 And these [Expectorators]..cast purulent and gypseous Matter out of the Bronchia. 1782 Phil. Trans. LXXII. 323 This clay..contains no gypseous matter. 1796 W. Marshall W. England I. 16, I was led to the idea, that they [crystals of quartz] were of a gypseous nature. |
2. Containing or consisting mainly of gypsum.
| 1771 Bp. Watson Chem. Ess. (1787) V. 127 Gypseous alabasters, plaster stone [etc.]. 1778 Woulfe in Phil. Trans. LXIX. 14 Heavy spars, commonly called selenitical or gypseous spars. 1830 Lyell Princ. Geol. (1875) I. i. vi. 111 The gypseous red marl of Aix, in Provence. 1849 Murchison Siluria xiii. 311 It is flanked by the Ural Mountains, gypseous limestones form the base. 1862 Dana Man. Geol. 247 Variegated gypseous marls. 1880 Libr. Univ. Knowl. (U.S.) XII. 478 The peculiar color [of the Red River] is attributed to the red clay of the gypseous formation..of its bed. |