SI length unit. No conversion function is given because this is a standard.
(= (Quantity.Dimension Meter) Length-Dimension)
(= (Base-Units Si-Unit) (Setof Meter Kilogram Second-Of-Time Ampere Degree-Kelvin Mole Candela Identity-Unit)) (= Kilometer (* Meter 1000)) (= Inch (/ Meter 39.37)) (= Angstrom (/ Meter (Expt 10 10))) (= Newton (* (* Kilogram Meter) (Expt Second-Of-Time -2))) (= Joule (* Newton Meter)) (= Pascal (* Newton (Expt Meter -2))) (= Watt (* Newton Meter))