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.
⇒ The trivium and quadrivium together made up the seven liberal arts. See Quadrivium.
2. Zool.
The three anterior ambulacra of echinoderms, collectively.
© Webster 1913.