S: (n) unit of measurement, unit (any division of quantity accepted as a standard of measurement or exchange) "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) metric unit, metric (a decimal unit of measurement of the metric system (based on meters and kilograms and seconds)) "convert all the measurements to metric units"; "it is easier to work in metric"
S: (n) unit of measurement, unit (any division of quantity accepted as a standard of measurement or exchange) "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"