birou Noun, n, birou bureau desk office study Appox. usage (any sense): 248 per million words Appox. usage (any sense): 248 per million words
biurou Noun, n, biurou obsolete form of birou Appox. usage (any sense): less than 0.1 per million words Appox. usage (any sense): less than 0.1 per million words