ˈdīəˌpi(ə)r noun
( -s )
Etymology: irregular from Greek diapeirein to drive through, pierce, from dia- + peirein to pierce; akin to Greek poreuein to convey — more at fare
: an anticlinal fold in which a mobile core has broken through the more brittle overlying rocks
• di·a·pir·ic |dīə|pirik adjective