Assertion: unit's definition | /r/HasProperty | adopted by the international bureau
Facets:
value: for measures
type: OTHER
value: for weights
type: OTHER
value: in 1971
type: TEMPORAL
Source sentences:
text: The IUPAC 1961 definition of the unified atomic mass unit, with that name and symbol "u", was adopted by the International Bureau for Weights and Measures (BIPM) in 1971 as a "non-SI unit accepted for use with the SI".