anauxite
noun
an·aux·ite
əˈnȯkˌsīt
plural -s
: a mineral consisting of hydrous aluminum silicate, occurring as interstratified layers of silica Si8O16 and kaolin Al4Si4O10(OH)8 with the latter predominant, and being a constituent of certain clays
Word History
Etymology
German anauxit, from Greek anauxēs not increasing (from an- + -auxēs, from auxein to increase) + German -it -ite
First Known Use
1842, in the meaning defined above