the discontinuity between the crust and the mantle of the earth, occurring at depths that average about 22 mi. (35 km) beneath the continents and about 6 mi. (10 km) beneath the ocean floor.
Also, Moho.
Origin: 1935–40; named after Andrija Mohorovičić (1857–1936), Croatian geophysicist, who discovered it
[moh-haw-roh-vuh-chich, -hoh-] 
