Pentad ('group of 5') or pentade may refer to: Pentad (chord), a five-note chord Pentad (computing), or pentade, a 5-bit group a division of the solar term Dramatistic pentad, Kenneth Burke's method of analyzing motivation Medical pentad, a group of five signs or symptoms which characterise a specific medical condition a tuple of length 5 See also 5 Quintet (disambiguation) Tetrad (disambiguation) ('group of 4') Hexad (disambiguation) ('group of 6') Lustrum, a five-year period in Ancient Rome. Pentadic numerals p-adic number Quinary