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Word of the Day Wednesday, June 10, 2026

ylem

/ˈjɛləm/ noun · British & US
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What does ylem mean?

noun

In cosmology, ylem is a hypothetical primordial substance from which the universe was formed. It is also used to describe a fundamental substance or material.

Example

"The cosmologist proposed that the universe began as a vast expanse of ylem, which eventually cooled and condensed into matter."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for ylem

Antonyms of ylem

Rhymes with ylem

Etymologically related