Magnetic

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early 17th century: from late Latin magneticus, from Latin magneta (see magnet).

wiktionary

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magnet +‎  -ic

etymonline

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magnetic (adj.)

1610s, literal, "having the properties of a magnet;" 1630s, figurative, "having powers of attraction;" from Modern Latin magneticus, from Latin magnes (see magnet). Meaning "capable of being attracted by a magnet" is by 1837. Related: Magnetical (1580s); magnetics "the science of magnetism" (1786).