Organ, in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system. Learn more about organs in this article.

Organ definition is - a differentiated structure (such as a heart, kidney, leaf, or stem) consisting of cells and tissues and performing some specific function in an organism. How to use organ in a sentence.

An organ is a group of tissues with similar functions. Plant and animal life rely on many organs that coexist in organ systems.. A given organ's main tissue ( tissues being groups of cells, similar in origin, that interact to effect that organ's biological function), are namely parenchyma, and sporadic tissues, also called stroma.The main tissue is unique for the specific organ, such as the ...

Organ definition, a musical instrument consisting of one or more sets of pipes sounded by means of compressed air, played by means of one or more keyboards, and capable of producing a wide range of musical effects. See more.

or·gan (ôr′gən) n. 1. Music a. An instrument consisting of a number of pipes that sound tones when supplied with air and a keyboard that operates a mechanism controlling the flow of air to the pipes. Also called pipe organ. b. Any one of various other instruments, such as the electronic organ, that resemble a pipe organ either in mechanism or sound ...

Organ, in music, a keyboard instrument, operated by the player’s hands and feet, in which pressurized air produces notes through a series of pipes organized in scalelike rows. The term organ encompasses reed organs and electronic organs but, unless otherwise specified, is usually understood to refer to pipe organs.

In music, the organ is a keyboard instrument of one or more pipe divisions or other means for producing tones, each played with its own keyboard, played either with the hands on a keyboard or with the feet using pedals. The organ is a relatively old musical instrument, dating from the time of Ctesibius of Alexandria (285–222 BC), who invented the water organ.

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