bu

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 : an old Japanese rectangular coin originally made of gold and from 1830 to 1870 of silver; also : a corresponding unit of value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