unobservable entities

Definitions

Entities that cannot be detected or measured directly by human senses or scientific instruments.

Theoretical constructs in science, such as electrons or quarks, whose existence is inferred from observable phenomena rather than direct observation.

Synonyms

imperceptible phenomena hidden constructs theoretical entities intangible objects undetectable elements abstract concepts invisible factors

Antonyms

observable phenomena tangible objects perceptible entities empirical facts visible evidence manifest realities detectable items