What is 7. (Chem.) (a) Any earthy-looking metallic oxide, as alumina, glucina, zirconia, yttria, and thoria. (b) A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta called?
earth — 7. (Chem.) (a) Any earthy-looking metallic oxide, as alumina, glucina, zirconia, yttria, and thoria. (b) A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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