dibutyro-
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dibutyl — (ˈ)dī+ adjective Etymology: di + butyl : containing two butyl groups in the molecule * * * dibutyl /dī būˈtil/ (chem) adjective Having two butyl groups dibutyl phthalate /thalˈāt/ noun The dibutyl ester of phthalic acid, used to keep off insects… … Useful english dictionary