Englishfor English speakers
theoretical
Adjective
—
Theoretical is about theory rather than its practical application.
Entanglement is important but difficult to study, both in terms of a theoretical understanding and doing experiments.
science
Noun
—
The study of finding how things work. Some kinds of science are mathematics, biology, physics and chemistry.
is a kind of science.
science
Proper noun
—
The sciences are the group of science subjects. These are mathematics, biology, physics and chemistry.