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

[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.


(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
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In Sarduy's own words, the universe is "another metaphor of the energy, what abruptly unfolds from the breaking of the primordial egg, ylem or potentiality state" ('una metafora mas de la energia, lo que abruptamente se despliega en la ruptura del huevo primitivo, ylem o estado puntual' [Barroco [243]).
Taking part in the local Battle of Grandmasters as the youngest entry in the women's division, she scored one positive result after another and wound up second behind the seasoned Ralf Ylem Jose by half a point.
In our study a commercial kit Apoptosis-1,5 (YLEM, Rome, Italy) was used for the TUNEL assay, according to the manufacturer's instructions.
Trivandrum, India, February 09, 2011 --(PR.com)-- Ylem Infotech Pvt.Ltd., a web service company which specializes in SEO and Mobile Game Development operates Androideep (http://androideep.com) an informative site that brings to you all the latest news and updates regarding the rapidly growing Android Mobile OS, has announced the weekly Access rankings from January 30- February 05, 2011.