In linguistics, a broken plural is an irregular plural form of a noun or adjective found in the Semitic languages and other Afroasiatic languages such as the Berber languages. Wikipedia

Irregular plural forms in Semitic and other Afroasiatic languages Wikidata

An irregular plural formed by changing the pattern of consonants and vowels inside the singular form, found in the Semitic languages and other Afroasiatic languages such as Berber. An example in Arabic is مَكَاتِب‎ (makātib, “desks”), the plural form of مَكْتَب‎ (maktab, “desk”). Wiktionary

In Arabic and other languages, irregular plural formed by changing the pattern of consonants and vowels. Wiktionary (translation)