Animal excrement used as fertilizer for soil improvement in agriculture.
From Old French 'manouvrer' meaning 'to work with the hands,' from Latin 'manu operari.' The sense shifted from general manual work to specifically working soil, then to the fertilizing substance itself.
The word 'manure' originally meant any kind of manual labor - its evolution to mean animal fertilizer reflects how closely tied human civilization has been to agricultural work throughout history.
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