Etymology
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Words related to magnesia

magnet (n.)

"variety of magnetite characterized by its power of attracting iron and steel," mid-15c. (earlier magnes, late 14c.), from Old French magnete "magnetite, magnet, lodestone," and directly from Latin magnetum (nominative magnes) "lodestone," from Greek ho Magnes lithos "the Magnesian stone," from Magnesia (see magnesia), region in Thessaly where magnetized ore was obtained. Figurative sense of "something which attracts" is from 1650s.

It has spread from Latin to most Western European languages (German and Danish magnet, Dutch magneet, Italian, Spanish, Portuguese magnete), but it was superseded in French by aimant (from Latin adamas; see adamant (n.)). Italian calamita "magnet" (13c.), French calamite (by 16c., said to be from Italian), Spanish caramida (15c., probably from Italian) apparently is from Latin calamus "reed, stalk or straw of wheat" (see shawm) "the needle being inserted in a stalk or piece of cork so as to float on water" [Donkin]. Chick magnet attested from 1989.

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pyrolusite (n.)

"manganese dioxide," a common ore, 1828, from Greek elements pyro- "by heat, by fire" (from PIE root *paewr- "fire") + lysis "a loosening" (from PIE root *leu- "to loosen, divide, cut apart"). The name was given in Roman times, when the substance was used, in a heated state, to de-colorize glass.

magnesium (n.)

silvery-white metallic element, 1808, coined by English chemist Sir Humphry Davy from the white alkaline earth magnesia (q.v.), in which it was found. With metallic element ending -ium.

manganese (n.)

1670s as the name of a black mineral, oxide of manganese (used from ancient times in glassmaking for removing coloring matter), from French manganèse (16c.), from Italian manganese, alteration or corruption of Medieval Latin magnesia (see magnesia). From 1783 in English as the name of the metallic element.

From the middle of the eighteenth century the combinations of manganese were studied by various chemists, and finally, in 1774, the metal manganese was isolated by Gahn, but for years there was much confusion in regard to its specific name, and it was not until after the beginning of the present century that the name manganese (mangan in German) began to be generally adopted. [Century Dictionary, 1897]

Related: Mangano-, manganic, manganous, manganate.

Magnesian (adj.)

"of or pertaining to Magnesia" (q.v.), either the district in Thessaly or one of two towns so called in Asia Minor, one near Miletus and the other in Lydia.