In linguistics, measure words are words that are used in combination with a numeral to indicate an amount of something represented by some noun. Wikipedia

A type of word in some languages Wikipedia Disambiguation

Words that measure quantities Wikidata

Word (or morpheme) that is used in combination with a numeral to indicate the count of nouns. Most are tied to a semantic class, such as "animals" or "long things". They are used in most East Asian languages, plus Bengali, as well as many Indigenous languages of the Americas near the Pacific coast. OmegaWiki

A word or morpheme used in combination with a numeral to indicate the count of nouns, used especially in Asian languages. Wiktionary

Measure word, classifier. Wiktionary (translation)