A group of five elements, also called a quintuplet or pentad.
Quintuple
See also
Monad, n-Tuple, Pair, Pentad, Quadruple, Quintuplet, Tetrad, Triad, Triple, TwinsExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Quintuple." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Quintuple.html