organor·gan /ˈɔːgənˈɔːr-/ noun [countableC] formal1a magazine or newspaper which presents the ideas and opinions of a political party or other organizationThese newspapers were essentially house organs for political factions.
a copy of the McDonald’s Corp. in-house organ (=magazine that it produces for its own employees)
2an organization that does a particular kind of work for the government or another organization or groupan overall accrual of power to the central organs of state
The International Court of Justice is the principal judicial organ of the UN.