picometer

Noun
  1. A metric unit of length equal to one trillionth of a meter (synset 113679505)
    is a type of: metric linear unit - a linear unit of distance in metric terms
    has: femtometer, femtometre, fermi - a metric unit of length equal to one quadrillionth of a meter
    is a part of: a, angstrom, angstrom unit - a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
    same as: micromicron, picometre

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