\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.