| butene | n. any of three isomeric singly unsaturated hydrocarbons |
| ブテン | [buten] (n) (See ブチレン) butene [Add to Longdo] |
| butylene | (n) any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers, Syn. butene |
| polybutylene | (n) a polymer of butylene; used in lubricants and synthetic rubber, Syn. polybutene |