trivium

The lower division of the seven liberal arts in medieval schools, consisting of grammar, logic, and rhetoric.

In the schools of the middle ages, the first three liberal arts (grammar, rhetoric, and logic)—the other four (namely, arithmetic, music, geometry, and astronomy) being termed quadrivium.

In echinoderms, as any sea-urchin, the three anterior ambulaera, taken collectively and distinguished from the two posterior ones taken together. See bivium, and cut under Spatangoida.

The three “ liberal” arts, grammar, logic, and rhetoric; — being a triple way, as it were, to eloquence.

The three anterior ambulacra of echinoderms, collectively.

The lower division of the liberal arts; grammar, logic and rhetoric.

The three anterior ambulacra of echinoderms, collectively.

(Middle Ages) an introductory curriculum at a medieval university involving grammar and logic and rhetoric; considered to be a triple way to eloquence