from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mobile pale-yellow liquid, C9H15COH, derived from lemon-grass oil and used in perfume and as a flavoring.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Either of a pair of terpenoids, geranial and neral, that have the molecular formula C10H16O and are used in perfumery and flavourings.
from The Century Dictionary and Cyclopedia
- n. A colorless liquid aldehyde of strong lemon odor, the flavor-giving constituent of oil of lemon, of which it forms from 5 to 8 per cent.: also present in oil of limes, mandarin, orange, etc.
citr(us) + -al3.(American Heritage® Dictionary of the English Language, Fourth Edition)