Standard Lemma guide

mysterium

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • Received-Pronunciation: /mɪˈstɪəɹɪəm/
  • General-American: /mɪˈstɪɹiəm/
  • CMU ARPABET: M IH2 S T IY1 R IY0 AH0 M Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

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.

Definition source: English Wiktionary via Wiktextract

Usage: historical

Topics: alchemy, chemistry, natural-sciences, physical-sciences, pseudoscience

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The hypothetical source of a galactic radio emission at 1665 megahertz (later identified as due to hydroxyl radicals in interstellar space).

Definition source: English Wiktionary via Wiktextract

Usage: historical

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Borrowed from Latin mystērium. Doublet of mystery.