ylem

English Thesaurus

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

hypernym	:	matter,
definition	:	that which has mass and occupies space (noun.tops)

domain category	:	cosmogeny, cosmogony, cosmology,
definition	:	the branch of astrophysics that studies the origin and evolution and structure of the universe (noun.cognition)