second
http://purl.obolibrary.org/obo/UO_0000010
Term info
database cross reference
- NCIt:C25666
- NCIt:C49463
- NCIt:C42535
- SNOMEDCT:81170007
EFO URI
http://www.ebi.ac.uk/efo/EFO_0001687
definition
A time unit which is equal to the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom., A second is a time unit which is equal to the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.
definition citation
UO_0000010
term editor
James Malone