† magniumn.
Chemistry. Obsolete.
= magnesium n. 2.The name was proposed and later withdrawn by Humphrey Davy: see quots. 1808, 1812.
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magnium1808
magnesium1812
1808 H. Davy in Philos. Trans. (Royal Soc.) 98 346 I shall venture to denominate the metals from the alkaline earths barium, strontium, calcium, and magnium: the last of these words is undoubtedly objectionable, but magnesium has been already applied to metallic manganese.
1812 H. Davy in Chem. Philos. v. 350 In my first paper on the decomposition of the earths..I called the metal from magnesia, magnium, fearing lest, if called magnesium, it should be confounded with the name formerly applied to manganese. The candid criticisms of some philosophical friends have induced me to apply the termination in the usual manner.
1849 H. Watts tr. L. Gmelin Hand-bk. Chem. III. 221 Magnesium... Magnium. Talcium.
1865 H. Watts Dict. Chem. III. 784 Magnium, Davy's name for magnesium.
This entry has been updated (OED Third Edition, March 2000; most recently modified version published online June 2018).
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n.1808