noun
donated item; gift
Refers to an object that has been formally donated, often to an institution such as a museum, library, or school.
図書館に寄贈品の本がたくさん届いた。
Many donated books arrived at the library.
贈り物 is a general gift given to someone, whereas 寄贈品 is a formal donation to an organization.
Compound of 寄贈 (donation) + 品 (item).