tricolon

Etymology

Learned borrowing from Ancient Greek τρικωλον (trikōlon), neuter of τρικωλος (trikōlos, “having three parts”). By surface analysis, tri- + colon.

Why this word is great

TRICOLON — [Noun] A sentence with three clearly defined parts of equal length, usually independent clauses, or the symbol ⟨⁝⟩, a colon with three dots instead of two. Learned borrowing from Ancient Greek τρικωλον (trikōlon), neuter of τρικωλος (trikōlos, "having three parts"), from tri- ("three") + colon ("limb, part"). Unlike "isocolon" (which encompasses any parallel structure) or "tricolon crescens" (which builds toward climax), the tricolon is a study in measured symmetry. It is the cadence of Caesar’s "Veni, vidi, vici," the rhythm of Lincoln’s "government of the people, by the people, for the people," the visual pause of ⟨⁝⟩ on an ancient manuscript—a testament to humanity’s instinct to arrange chaos into triads, as if three were the smallest number that could contain a world.

noun

A sentence with three clearly defined parts of equal length, usually independent clauses.“By my count, that’s three tricolons in just over 100 words. It’s almost impossible to make A.I. stop saying “It’s not X, it’s Y” — unless you tell it to write a story, in which case it’ll drop the format for a more literary “No X. No Y. Just Z.””
The symbol ⟨⁝⟩, a colon with three dots instead of two.