Microspan
A microspan was a small unit of time used on Gallifrey, (AUDIO: Weapon of Choice, et al.) shorter than a span (AUDIO: Forever) but longer than a nanospan. (AUDIO: The Inquiry) As employed by Lord President Romana, Darkel, and K9 Marks I and II, it seemed to indicate a length of time somewhere between Earth seconds and minutes. (AUDIO: Gallifrey[which?]) Although Time Lords on Gallifrey used the term liberally, the Doctor never attempted to make their companions learn about the unit.
Lord President Romana had a feature in her Presidential TARDIS which allowed for materialisation to be paused for two microspans. This pause lasted a little under one minute. (AUDIO: A Blind Eye)
A Timonic Fusion Device could be armed for detonation in 45 microspans. (AUDIO: Weapon of Choice)
A unit of the same name was also used by Terpsivores. Twelve Terpsivorian microspans were less than two minutes. (COMIC: Death Disco)
