| Word | Definitions | Synonyms |
|---|---|---|
| ethyl | (noun) the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom | Synonyms: ethyl group, ethyl radical |
| ethylene | (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic | Synonyms: ethene |
| ethyne | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: acetylene, alkyne |