picometer

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a metric unit of length equal to one trillionth of a meter
• Syn:
picometre, micromicron
• Hypernyms:
metric linear unit
• Part Holonyms:
angstrom, angstrom unit, A
• Part Meronyms:
femtometer, femtometre, fermi