Two ethyl groups attached to the same molecule.(noun)
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Use "diethyl" in a sentence
"If you are exposed to a hazardous chemical such as diethyl phthalate, several factors will determine whether harmful health effects will occur and what the type and severity of those health effects will be."
"Many fragrances contain diethyl phthalate, a chemical linked to sperm damage in adult men and abnormal reproductive development in baby boys."
"Several agricultural innovations like 2,4-D weed spray and diethyl stilbestrol for cattle feeding were banned by federal agencies because of their carcinogenic consequences."