mysterium (English, noun)
expansion: mysterium (plural mysteria)
Senses:
topics: alchemy
chemistry
natural-sciences
physical-sciences
pseudoscience
glosses: 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.
tags: historical
topics: astronomy
natural-sciences
glosses: The hypothetical source of a galactic radio emission at 1665 megahertz (later identified as due to hydroxyl radicals in interstellar space).
tags: historical
Forms:
form: mysteria
tags: plural