I. ˈb(y)ü noun
( plural bu )
Etymology: Japanese
1. : an old Japanese rectangular coin originally made of gold and from 1830 to 1870 of silver ; also : a corresponding unit of value
1/4- bu and 2- bu pieces were issued
2. : either of two Japanese units of measure:
a. : a unit of length equal to 0.1 inch
b. : tsubo
II. abbreviation
1. blue
2. bulletin
3. bureau
4. bushel