Search Result for "stratigraphy": 
Wordnet 3.0

NOUN (1)

1. the branch of geology that studies the arrangement and succession of strata;


The Collaborative International Dictionary of English v.0.48:

Stratigraphy \Stra*tig"ra*phy\, n. [Stratum + -graphy.] That branch of geology which treats of the arrangement and succession of strata. [1913 Webster]
WordNet (r) 3.0 (2006):

stratigraphy n 1: the branch of geology that studies the arrangement and succession of strata