1) Non-SI metric unit
Found on
https://www.crosswordclues.com/clue/bubnoff-unit
The Bubnoff unit (abbreviated B) is a unit of speed equal to 1 m / 106 a. In other words, 1 B is equal to 1 meter in 1,000,000 years, 1 millimeter in 1,000 years, or one micrometer per year. The Bubnoff unit is employed in geology to measure rates of lowering of earth surfaces due to erosion and is named after the Russian (German-Baltic) geologist...
Found on
http://en.wikipedia.org/wiki/Bubnoff_unit
No exact match found.
