3 example sentences using quadruplet.
Quadruplet used in a sentence
Quadruplet in a sentence as a noun
That's like saying UTF-8 requires "nonsense" pair, triplet, or quadruplet chars.
A triplet is just an atom plus a pair, and a quadruplet is an atom plus a triplet, and so forth.
Same is true for triples, quadruplets, ... with different probabilities.