Lanthanum
Chamber's Twientieth Century Dictionary · 1908 · p. 58
lan′tha-num, n. a metal discovered in 1839 in cerite, a hydrated silicate of cerium.—Also Lan′thānium . [Gr. lan thane in , to conceal.]
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A Dictionary of Scientific Terms (1927)
Hawkins' Electrical Dictionary (1915)
The American Illustrated Medical Dictionary (1913)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
Chandler's Encyclopedia (1898)
An Illustrated Encyclopedic Medical Dictionary (1893)
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