magnesia (n.) late 14c., in alchemy, "main ingredient of the philosopher's stone," from M.L. magnesia, from Gk. (he) Magnesia (lithos) "the lodestone," lit. " (the) Magnesian (stone)," from Magnesia, region in Thessaly, which is said to be named for the native people name Magnetes, which is of unknown origin. The ancient word, in this sense, has evolved into MAGNET (Cf. magnet). But in ancient times the same word, magnes, was used of lodestone as well as of a mineral commonly used in bleaching glass (modern PYROLUSITE (Cf. pyrolusite), or manganese dioxide).
In Middle Ages there was some attempt to distinguish lodestone as magnes (masc.) and pyrolusite as magnesia (fem.). Meanwhile, in 18c., a white powder (magnesium carbonate) used as a cosmetic and toothpaste was sold in Rome as magnesia alba ("white magnesia"). It was from this, in 1808, that Davy isolated MAGNESIUM (Cf. magnesium). He wanted to call it magnium, to stay as far as possible from the confused word magnesia, but the name was adopted in the form magnesium. Meanwhile from 16c. the other name of pyrolusite had been corrupted to manganese, and when, in 1774, a new element was isolated from it, it came to be called MANGANESE (Cf. manganese).
Magnesia in its main modern sense of "magnesium oxide" (1755) is perhaps an independent formation from L. magnes carneus "flesh-magnet" (c.1550), so called because it adheres strongly to the lips.

Etymology dictionary. 2014.

Look at other dictionaries:

  • Magnesia — puede referirse a: Magnesia, una unidad periférica actual de Grecia. Magnesia, una prefectura de Grecia, que abarcaba la unidad periférica de Magnesia y las Espóradas. Varias antiguas ciudades griegas (poleis): Magnesia de Tesalia, la metrópolis… …   Wikipedia Español

  • Magnesia — ist der Name folgender geographischer Objekte: Magnisia, eine Präfektur in Griechenland in der altgriechischen Transkription Magnesia (Thessalien), eine antike Stadt in Thessalien Magnesia am Mäander, eine antike Stadt in der heutigen Türkei… …   Deutsch Wikipedia

  • Magnesia — may refer to: a Greek toponym, derived from the tribal name Magnetes Magnesia (peripheral unit), the southeastern area of Thessaly in central Greece Magnesia ad Sipylum, a city of Lydia Magnesia on the Maeander, an ancient Greek city in Anatolia… …   Wikipedia

  • Magnesia — Sf (Mineral) per. Wortschatz fach. (18. Jh.) Entlehnung. L. magnēs aus gr. magnēs bezeichnete eigentlich den Magnetstein, mit dem aber schon seit alters das Mineral Braunstein verwechselt wurde. Im Mittelalter wurde im Gefolge von Plinius l.… …   Etymologisches Wörterbuch der deutschen sprache

  • magnesia — [mag nē′zhə, mag nēshə] n. [ModL magnesia (alba), lit., (white) magnesia (in contrast to ML magnesia, a black mineral < LGr magnēsia < Magnēsia,MAGNESIA): term substituted by F. Hoffmann (1660 1742), Ger physician, for ModL magnes carneus,… …   English World dictionary

  • Magnesia — • A titular see in Lydia, suffragan of Ephesus Catholic Encyclopedia. Kevin Knight. 2006. Magnesia     Magnesia     † …   Catholic encyclopedia

  • Magnesia — Mag*ne si*a (?; 277), n. [L. Magnesia, fem. of Magnesius of the country Magnesia, Gr. h Magnhsi a li qos a magnet. Cf. {Magnet}.] (Chem.) A light earthy white substance, consisting of magnesium oxide ({MgO}), and obtained by heating magnesium… …   The Collaborative International Dictionary of English

  • Magnesia [1] — Magnesia (Magnesiumoxyd, Bittererde, Talkerde) Mg O, in der Natur als seltenes Mineral (Periklas) vorkommend, wird künstlich durch Erhitzen des Karbonats oder Oxydhydrats gewonnen (gebrannte Magnesia, M. usta). Es bildet eine weiße leichte… …   Lexikon der gesamten Technik

  • Magnesĭa [2] — Magnesĭa, 1) (Chem., Bittererde), das Oxyd des Magnesiums, s.d. A); 2) Magnesia alba (Weiße M.) u. M. carbonica (Kohlensaure M.), s. unter Kohlensaure Salze; M. usta (M. calcinata, Gebrannte Magnesia, s.u. Magnesium A) …   Pierer's Universal-Lexikon

  • Magnesia — Magnesia, Magnesia; M. alba, carbonica, hydrico carbonica, weiße M., basisch kohlensaure M.; M. citrica effervescens, brausende zitronensaure M., s. Brausepulver; M. lactica, milchsaure M.; M. nigra, Braunstein; M. sulfurica, schwefelsaure M.,… …   Meyers Großes Konversations-Lexikon