The aroma of the note is immediately sharp, intensely zesty, and brilliantly effervescent, a burst of invigorating freshness that prickles the nose with its vibrant acidity. Unlike the softer, sweeter juiciness of the lemon pulp, this note focuses on the complex, aromatic oils residing in the outer skin. It presents a distinctive tang, often with a subtle, sophisticated bitterness at its very edge, preventing it from becoming cloyingly sweet. Its texture is almost dry, a fine powder of zest rather than a viscous liquid, projecting a clean, almost metallic sheen in its initial impression. It is the quintessential top note, offering an immediate, undeniable 'lift' to any composition, a radiant opening that demands attention. Its longevity is characteristically fleeting, a glorious comet streaking across the olfactory sky before gracefully ceding to the heart notes, yet its impact on the overall brightness and clarity of a fragrance can be profound and lasting.