Associations to the word «Femtometer»
Wiktionary
FEMTOMETER, noun. US spelling of femtometre A length of 10-15 of a meter, 1 quadrillionth of a meter.
Dictionary definition
FEMTOMETER, noun. A metric unit of length equal to one quadrillionth of a meter.
Wise words
Four things come not back. The spoken word, the sped arrow,
the past life, ad the neglected opportunity.