moho

Noun
  1. The boundary between the Earth's crust and the underlying mantle (synset 109379977)
    "the Mohorovicic discontinuity averages 5 miles down under oceans and 20 miles down under continents"
    referred to in: geology - a science that deals with the history of the earth as recorded in rocks
    is an instance of: bound, boundary, bounds - the line or plane indicating the limit or extent of something
    same as: mohorovicic discontinuity

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