| Word | Definitions | Synonyms |
|---|---|---|
| butyl | (noun) a hydrocarbon radical (C4H9) | - |
| butylene | (noun) any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers | Synonyms: butene |
| butyrin | (noun) any of three glycerides of butyric acid | - |
| isobutylene | (noun) used also in making gasoline components | - |
| polybutylene | (noun) a polymer of butylene; used in lubricants and synthetic rubber | Synonyms: polybutene |
| tributyrin | (noun) a bitter oily triglyceride of butyric acid; a form of butyrin | - |