A fragrant chemical compound derived from cinnamon or similar sources; cinnamaldehyde or related aromatic aldehydes.
From cinnamon + -al (suffix for aldehydes in chemistry). Cinnamal compounds are responsible for cinnamon's distinctive spicy smell and taste.
Cinnamal is the molecule that makes your brain sense 'cinnamon'—it's so distinctive that even a tiny amount triggers the smell receptor in your nose, which is why one whiff of cinnamon is instantly recognizable.
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