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busy Lizzie
busy signal
busybody
busywork
but
but-
but and ben
butadiene
butanal
butane
butanoic acid
butanol
butanone
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butanal
bu·ta·nal [ byt'nəl ]


noun 
Definition:
 
chemistry 
Same as  butyraldehyde
[Late 20th century. <butanol]
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