ylem

y·lem

 (ī′ləm)

n.

A form of matter hypothesized by proponents of the Big Bang theory to have existed before the formation of the chemical elements.

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[Middle English, universal matter, from Old French ilem, from Medieval Latin hȳlem, accusative of hȳlē, matter, from Greek hūlē.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ylem

(ˈaɪləm)

n

(Astronomy) the original matter from which the basic elements are said to have been formed following the explosion postulated in the big bang theory of cosmology

[Middle English, from Old French ilem, from Latin hӯlē stuff, matter, from Greek hulē wood, matter]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Thesaurus

Noun

1.

ylem - (cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements matter - that which has mass and occupies space; "physicists study both the nature of matter and the forces which govern it" cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe

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