From HomoExcelsior

1. pipe organ 2. Any one of various other instruments, such as the electronic organ, that resemble a pipe organ either in mechanism or sound. 3. A differentiated part of an organism, such as an eye, a wing, or a leaf, that performs a specific function. 4. The FBI is an organ of the Justice Department. 5. An instrument or a means of communication, especially a periodical issued by a political party, business firm, or other group.

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