Search Result for "ylem": 
Wordnet 3.0

NOUN (1)

1. (cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements; 



WordNet (r) 3.0 (2006):

ylem
    n 1: (cosmology) the original matter that (according to the big
         bang theory) existed before the formation of the chemical
         elements