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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The boundary between the earth's crust and the underlying mantle, averaging 8 kilometers (5 miles) in depth under the oceans and 32 kilometers (20 miles) in depth under the continents.


After Andrija Mohorovičić (1857-1936), Croatian geophysicist.
(American Heritage® Dictionary of the English Language, Fourth Edition)


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