English
magnetofossil
From magneto- + fossil.
Proto-Indo-European *bʰedʰh₂- ‘to dig, burrow’
…
Proto-Italic *foðjō ‘to pierce’
Latin fodio ‘to dig up’
Latin fossilis ‘something which has been dug up’
French fossile
English fossil
Today it means
noun The fossil remains of a magnetotactic bacterium
Language periods are conventional ranges, not dates for this word.
Etymograph / magnetofossil