noun, masculine/tʁɔ̃ kɔ.mœ̃/plural: troncs communs
core curriculum (courses or other components of an educational program which are foundational, prerequisite, or mandatory, as opposed to the elective, secondary, or variable components of a program)
“une matière du tronc commun” — a core course, a core subject
Calque of Latin truncus commūnis.