Term from David Brin's Uplift series of novels. A dura is a period of time approximately one-third of a minute. The dura is the principal unit of time of the Civilisation of the Five Galaxies.

Other units of Galactic time, in proportion to the dura:
kidura: One thirty-sixth of a dura.
midura: 214 duras.
jadura: 7740 duras, or 36 miduras.
pidura: 279936 duras, or 36 jaduras.