Wordnet 3.0
NOUN (1)
1.
(Middle Ages) an introductory curriculum at a medieval university involving grammar and logic and rhetoric;
considered to be a triple way to eloquence;
The Collaborative International Dictionary of English v.0.48:
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.
[1913 Webster]
Note: The trivium and quadrivium together made up the seven
liberal arts. See Quadrivium.
[1913 Webster]
2. (Zool.) The three anterior ambulacra of echinoderms,
collectively.
[1913 Webster]
WordNet (r) 3.0 (2006):
trivium
n 1: (Middle Ages) an introductory curriculum at a medieval
university involving grammar and logic and rhetoric;
considered to be a triple way to eloquence