Definition of subcrust in English:

subcrust

adjective

  • Attributive Lying or taking place beneath a crust, especially (Geology) beneath the crust of the earth.

noun

  • A layer that underlies a crust; specifically (a) Geology a (semi-molten) layer of rock beneath the earth's crust; (b) a supporting layer beneath the upper surface of a road.

Origin

Late 19th century. From sub- + crust.

Pronunciation

subcrust

/ˈsʌbkrʌst/