Silica
Hawkins' Electrical Dictionary · 1915 · p. 3
—In chemistry, an oxide of silicon, known also as silex.
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
The American Illustrated Medical Dictionary (1913)
Chamber's Twientieth Century Dictionary (1908)
The Student's Medical Dictionary (1896)
An Illustrated Encyclopedic Medical Dictionary (1894)
Zell's Condensed Dictionary (1879)
Dictionary of Science, Literature and Art (1854)
Dictionary of Science, Literature and Art (1842)
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