organ [OE] The word organ came via Latin from Greek organon ‘tool, instrument, sense organ’, also found in organize [LME]. Organ was first adopted in the ‘musical instrument’ sense. Organic [LME], extending the sense ‘natural’ that arose in the late 18th century and that of ‘derived from living matter’, as in organic fertilizer of the mid 19th, has been used meaning ‘produced without the use of artificial chemicals’ from the mid 19th century.