Moho

noun
Mo·​ho | \ˈmō-ˌhō \

Definition of Moho 

: the boundary layer between the earth's crust and mantle whose depth varies from about 3 miles (5 kilometers) beneath the ocean floor to about 25 miles (40 kilometers) beneath the continents

First Known Use of Moho

1952, in the meaning defined above

History and Etymology for Moho

short for Mohorovicic discontinuity, from Andrija Mohorovičić †1936 Yugoslavian geologist

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The first known use of Moho was in 1952

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