noun
student library assistant; library committee member
A student who serves on the school library committee, helping with book lending, shelf organization, and library events.
私は中学校で図書委員をしています。
I am a library committee member at my junior high school.
図書委員が新しい本の貸し出しを始めた。
The library assistants started lending out the new books.
Compound of 図書 (library books) and 委員 (committee member). A straightforward modern school term.