(biology) the field of science concerned with processes of communication and control (especially the comparison of these processes in biological and artificial systems)
wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard
a fully differentiated structural and functional unit in an animal that is specialized for some particular function
a periodical that is published by a special interest group; "the organ of the communist party"
a government agency or instrument devoted to the performance of some specific function; "The Census Bureau is an organ of the Commerce Department"