Adjective
polyplural (not comparable)
(linguistics, of a noun class) Containing plurals of nouns in distinct noun classes.
A polyplural noun class is a plural class for more than one singular class. citation For example, Proto-Bantu class 10 contains plurals of class 9 nouns and class 11 nouns, while class 6 contains plurals of class 5 nouns and class 15 nouns. Source: Internet
Classes 6 and 10 are inherited as polyplural classes by most surviving Bantu languages, but many languages have developed new polyplural classes that are not widely shared by other languages. Source: Internet
For example, by Meinhof's numbering, Shona has 20 classes, Swahili has 15, Sotho has 18 and Ganda has 17. Additionally, there are polyplural noun classes. Source: Internet