A conversation between three people is considered a “trialogue.” Some famous examples of trialogues are conversations between Frodo, Sam, and Gandalf (“Lord of the Rings”); Rachel, Monica, and Phoebe (“Friends”); Luke, Leia, and Han (“Star Wars”); and Aramis, Athos, and Porthos (“The Three Musketeers”). “Trialogue” is a composite word derived from “tri,” meaning “three,” and “dialogue,” meaning “conversation.” While a dyad is a grouping of two individuals, “dialogue” doesn’t necessarily refer to a conversation between just two people. “Dialogue” comes from the Greek word “dialegesthal,” which means “to converse with.”