#picometer__picometre__micromicron  a metric unit of length equal to one trillionth of a meter
  supertype:  metric_linear_unit  a linear unit of distance in metric terms
  part:  femtometer
  part of:  angstrom_unit__angstrom__A  a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
     part of:  nanometer__nanometre__millimicron__micromillimetre  a metric unit of length equal to one billionth of a meter
        part of:  micron__micrometer  a metric unit of length equal to one millionth of a meter
           part of:  millimeter__millimetre__mm  a metric unit of length equal to one thousandth of a meter
              part of:  centimeter__centimetre__cm  a metric unit of length equal to one hundredth of a meter
                 part of:  decimeter__decimetre__dm  a metric unit of length equal to one tenth of a meter
                    part of:  meter__metre__m  the basic unit of length adopted under the System International d'Unites (approximately 1.094 yards)
                       part of:  decameter__dekameter__decametre__dekametre__dam__dkm  a metric unit of length equal to ten meters
                          part of:  hectometer__hectometre__hm  a metric unit of length equal to 100 meters
                             part of:  kilometer__kilometre__km__klick  a metric unit of length equal to 1000 meters (or 0.621371 miles)
                                part of:  myriameter__myriametre__mym  a metric unit of length equal to 10,000 meters

No statement uses or specializes picometer; click here to add one.