三學科
Trivium \Triv"i*um\, n. [LL. See {Trivial}.] 1. The three `` liberal'' arts, grammar, logic, and rhetoric; -- being a triple way, as it were, to eloquence. Note: The trivium and quadrivium together made up the seven liberal arts. See {Quadrivium}. 2. (Zo["o]l.) The three anterior ambulacra of echinoderms, collectively.