Definition of 補助単位 (ほじょたんい)

noun
1.
prefixed unit of measurement (i.e. millimeter, kilogram, etc.)(obsolete)
2.
supplementary SI unit (radian and steradian)
See also:組立単位
Related Kanji
supplement, supply, make good, offset, compensate, assistant, learner
help, rescue, assist
simple, one, single, merely
rank, grade, throne, crown, about, some