montmorilloniticadj.
/ˌmɒntmərɪləˈnɪtɪk/, U.S. /ˌmɑn(t)məˌrɪləˈnɪdɪk/ Mineralogy.
Resembling or containing montmorillonite.
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the world > the earth > minerals > mineral sources > [adjective] > yielding a mineral or metal > others
amethystine1670
marcasitical1670
cawky1676
blendy1683
sylvanitic1796
ytter1805
phosphatic1818
pyroxenic1819
hornblendic1823
muriatiferous1823
platiniferous1828
quartziferous1831
hypersthenic1838
schorly1838
uralitic1845
blendous1847
rutilated1849
orthoclase1853
palladiferous1866
peridotic1867
paragonitic1868
vivianitized1870
andesitic1876
tremolitic1880
phosphoriferous1881
kaolinitic1885
saussuritic1885
perthitic1887
strontianiferous1888
radiferous1899
myrmekitic1916
montmorillonitic1939
illitic1949
the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [adjective] > montmorillonite
montmorillonitic1939
1939 Amer. Midland Naturalist 22 470 The Porters Creek clay is..composed chiefly of very fine-grained silty carbonaceous montmorillonitic clay.
1958 Nature 6 Dec. 1596/1 The montmorillonitic nature of this mineral.
1970 New Scientist 15 Jan. 98/1 In Mexico..the remarkable natural montmorillonitic clay itself provides the mud.
1983 J. McPhee In Suspect Terrain 22 Houston rests on two thousand feet of montmorillonitic clay, a substance that, when moist, turns into mobile jelly.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1939