a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region
the junction between two neurons (axon-to-dendrite) or between a neuron and a muscle; "nerve impulses cross a synapse through the action of neurotransmitters"
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"
(law) a proceeding (usually by a court) where evidence is taken for the purpose of determining an issue of fact and reaching a decision based on that evidence
the ability to hear; the auditory faculty; "his hearing was impaired"
a session (of a committee or grand jury) in which witnesses are called and testimony is taken; "the investigative committee will hold hearings in Chicago"
an opportunity to state your case and be heard; "they condemned him without a hearing"; "he saw that he had lost his audience"
the eye unaided by any optical instrument that alters the power of vision or alters the apparent size or distance of objects; "it is not safe to look directly at the sun with the naked eye"