Use of the word 'organ'

[Monkzie]

A rather boring question for you - its generally regarded by engineers and scientists that the church organ is the most sophisticated machine ever built by man before the Industrial Revolution (as well as the clock), but where does the word 'organ' come from? What is its origins?

[kempie]

Paraphrased from the OED:

Organ - a musical instrument (L. organum, instrument, engine; Gr. �qcamom, orig. �that with which one works�)