A unit of measurement equal to ten meters.
From Greek 'deca' (ten) + 'meter' (unit of length). Part of the metric system established in France in the 1790s to create a universal measurement standard.
The decameter is barely used in everyday life—we jump from meters to hectometers, but it exists in the metric system like an invisible rung on a ladder, showing the beautiful logical structure of the metric system!
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