mysterium.
Any of various unknown elements thought to make up existing forms of matter, or a substance seen as an elemental or pure form of something else.
Meaning & usage
Any of various unknown elements thought to make up existing forms of matter, or a substance seen as an elemental or pure form of something else.
The hypothetical source of a galactic radio emission at 1665 megahertz (later identified as due to hydroxyl radicals in interstellar space).
Where this word comes from
Borrowed from Latin mystērium. Doublet of mystery.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.