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Definition of Ethyl
1. Noun. The univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom.
Definition of Ethyl
1. n. A monatomic, hydrocarbon radical, C2H5 of the paraffin series, forming the essential radical of ethane, and of common alcohol and ether.
Definition of Ethyl
1. a univalent chemical radical [n -S]
Medical Definition of Ethyl
1.