Second

Definition 1

Coming next after the first in position in space or time or degree or magnitude. (NCI Thesaurus)

Definition 2

A suffix denoting the second person having the same complete name (first, middle, and family names). (NCI Thesaurus)

Definition 3

A unit of time, one of the seven base units of the International System of Units (Systeme International d'Unites, SI). The second is the duration of 919 263 177 0 periods of the specified light radiation corresponding to the transition between the two hyperfine levels of the caesium 133 atom in its ground state at 0 K. According to the convention, 60 seconds constitute one minute; 3,600 seconds constitute one hour. (NCI Thesaurus)

Definition 4

The second is a unit of time with a duration of 919 263 177 0 periods of the specified light radiation corresponding to the transition between the two hyperfine levels of the cesium 133 atom in its ground state at 0 K. According to the convention, 60 seconds constitute one minute; 3,600 seconds constitute one hour. Abbreviation Sec. is acceptable in non-scientific usage only. (NCI Thesaurus/CDISC)

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