| NOUN | substance | ylem | (cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements |
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| Meaning | (cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements. | |
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| Category | cosmology, cosmogony, cosmogeny | The branch of astrophysics that studies the origin and evolution and structure of the universe |
| Broader | matter | That which has mass and occupies space |
| Spanish | ylem | |
| Catalan | ylem | |
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