vanillin

== English == === Etymology === From vanilla + -in. === Pronunciation === IPA(key): /vəˈnɪlɪn/, /ˈvænəlɪn/ Hyphenation: va‧nil‧lin === Noun === vanillin (countable and uncountable, plural vanillins) A chemical compound, 4-hydroxy-3-methoxybenzaldehyde, that is the primary constituent of vanilla. A synthetic compound used as a substitute for the extract of the vanilla bean. ==== Translations ====