Bubnoff unit
nounEtymology Named after the geologist Serge von Bubnoff (1888–1957).
1
A unit of speed (abbreviated B) equal to one meter per 1,000,000 years, used in geology to measure rates of lowering of earth surfaces due to erosion.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.