a fully differentiated structural and functional unit in an animal that is specialized for some particular function

a government agency or instrument devoted to the performance of some specific function

(music) an electronic simulation of a pipe organ

a periodical that is published by a special interest group

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 free-reeded instrument with a piano keyboard in which air is forced through the reeds by bellows