magnetosphere=المغنتوسفير

magnetosphere=المغنتوسفير

ONLINE ETYMOLOGY DICTIONARY:

magnetosphere (n.)

1959, from magneto- + sphere. So called because in it the magnetic field of the earth plays a dominant role in the motion of particles.

magneto-

word-forming element meaning "magnetic, magnetism," from Gk. magneto-, combining form of magnes (see magnet).

magnet (n.)

mid-15c. (earlier magnes, late 14c.), from O.Fr. magnete "magnetite, magnet, lodestone," and directly from L. magnetum (nom. magnes) "lodestone," from Gk. ho Magnes lithos "the Magnesian stone," from Magnesia, region in Thessaly where magnetized ore was obtained. Figurative use from 1650s. It has spread from Latin to most Western European languages (cf. German and Danish magnet, Dutch magneet, Italian, Spanish, Portuguese magnete), but it was superseded in French by aimant. Also cf. magnesia. Chick magnet attested from 1989.

sphere (n.)

1530s, restored spelling of M.E. spere (c.1300) "space, conceived as a hollow globe about the world," from O.Fr. espere (13c.), from L. sphaera "globe, ball, celestial sphere," from Gk. sphaira "globe, ball," of unknown origin.

Sense of "ball, body of globular form" is from late 14c. Medieval astronomical meaning "one of the 8 (later 10) concentric, transparent, hollow globes believed to revolve around the earth and carry the heavenly bodies" is from late 14c.; the supposed harmonious sound they made rubbing against one another was the music of the spheres (late 14c.). Meaning "range of something" is first recorded c.1600 (e.g. sphere of influence, 1885, originally in reference to Anglo-German colonial rivalry in Africa). A spherical number (1640s) is one whose powers always terminate in the same digit as the number itself (5,6, and 10 are the only ones).