Main Entry: di·a·pir

Pronunciation: \ˈdī-ə-ˌpir\

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 \ˌdī-ə-ˈpir-ik\ adjective