from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A transparent, highly flammable liquid, C4H8O, used in synthesizing resins.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The aliphatic aldehyde CH3-CH2-CH2-CHO derived from butane
butyr(ic) + aldehyde.(American Heritage® Dictionary of the English Language, Fourth Edition)