materia subtilis
Noun
Meaning
materia subtilis (uncountable)
(historical) An ethereal substance once believed to fill spaces emptied of air (i.e. any vacuum) and to be capable of passing through solid objects.
Noun
materia subtilis (uncountable)
(historical) An ethereal substance once believed to fill spaces emptied of air (i.e. any vacuum) and to be capable of passing through solid objects.