This is the 8797th most frequent Russian word.
полины
"Полины" is the plural form of the female name "Полина" (Polina).
refers to an artistic or descriptive term, possibly a poetic usage.
Это фрагмент полины, найденный в древней книге.
This is a fragment of polina, found in an ancient book.
indicates the proper noun 'Polina' in its genitive case form, used to express possession or connection.
Мы встретили Полины в парке вчера.
We met Polina in the park yesterday.
'Полины' here is the genitive singular or plural form of the word for 'pollen', describing the cleaning material.