Search Result for "lithiasis": 
Wordnet 3.0

NOUN (1)

1. the formation of stones (calculi) in an internal organ; 



The Collaborative International Dictionary of English v.0.48:

Lithiasis \Li*thi"a*sis\ (l[i^]*th[imac]"[.a]*s[i^]s), n. [NL.,
   fr. Gr. liqi`asis, fr. li`qos stone.] (Med.)
   The formation of stony concretions or calculi in any part of
   the body, especially in the bladder and urinary passages.
   --Dunglison.
   [1913 Webster]


WordNet (r) 3.0 (2006):

lithiasis
    n 1: the formation of stones (calculi) in an internal organ