Trivial Tuesday

Today I have game for you, my loyal reader(s).

The category for today is Name That Word:

The singular form of this word is a term for the intersection of three roads or a collective name for the three "less important" liberal arts: logic, grammar and rhetoric. The more common, plural form refers to things of little or no importance. (I'm looking for the plural form.)

Post your answers in the comment section. The first person to answer correctly gets absolutely nothing (other than bragging rights).

Until later...


Update: Congratulations to palabra jot, who knew that the meeting of three roads is a trivium. The plural form of trivium is trivia, which of course means useless information. You see, the answer to our very first trivia question was "trivia." Aren't we oh, so witty? Ok, maybe not.