Subject
/ˈsəbjekt/
ꜱᴇᴍᴀɴᴛɪᴄ
: a branch of knowledge to be studied or taught; the content of a particular domain or field of knowledge
// academic disciplines, university course list, advanced level subjects
Subjects are areas of inquiry that contribute to the rich tapestry of human knowledge and spark intellectual curiosity for those who are ready to learn.
On the unity of subjects
The New Liberal Arts
"The Idea of a University" by John Henry Newman