A metric unit of volume equal to one-tenth of a liter, or 100 milliliters.
From French 'déci-' (one-tenth) plus 'liter' (from Greek 'litra' via Latin). The metric system standardized this unit in the late 1700s alongside other decimal-based measurements.
A deciliter is exactly the size of many small juice boxes or medicine cups, making it useful in everyday contexts—though most English speakers never encounter the term because we default to milliliters or fluid ounces instead.
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