This is the 11539th most frequent Russian word.
дочерней
"Дочерней" means "subsidiary" or "daughter" (adjective form).
The word "дочерней" is used as an adjective describing the noun "структурой" (structure), indicating it belongs to or is derived from a parent entity.
Эта компания является дочерней структурой международного концерна.
This company is a subsidiary structure of an international corporation.
Here, "дочерней" describes "организацией" (organization), specifying that it is a subsidiary as opposed to the main entity.
Иван показал отличия между основной компанией и её дочерней организацией.
Ivan showed the differences between the main company and its subsidiary organization.
In this sentence, "дочерних" is used to qualify "подразделений" (divisions), denoting these units as subsidiaries associated with the main firm.