Search Result for "diapir": 
Wordnet 3.0

NOUN (1)

1. a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata; 



WordNet (r) 3.0 (2006):

diapir
    n 1: a domed rock formation where a core of rock has moved
         upward and pierced through the more brittle overlying
         strata