Noun
(uncountable, organic chemistry, especially in combination) Two alkyl groups in a compound
(countable, organic chemistry) Any compound containing two alkyl groups
Source: en.wiktionary.orgAryldialkylphosphatase (also known as organophosphorus hydrolase, phosphotriesterase, and paraoxon hydrolase) uses an aryl dialkyl phosphate and H 2 O to produce dialkyl phosphate and an aryl alcohol. Source: Internet