411 REFERENCE · Wiktionary
Bubnoff unit
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after the geologist Serge von Bubnoff (1888–1957).
Noun
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.
en eponyms
en Units of measure