n.
Pronunciation: ' d ī - ə - ˌ pir
Function: noun
Etymology: French, probably from Greek diapeirein to drive through, from dia- + peirein to pierce; akin to Greek poros passage ― more at FARE
Date: 1918
: an anticlinal fold in which a mobile core has broken through brittle overlying rocks
– di · a · pir · ic \ ˌ d ī - ə - ' pir-ik \ adjective