Aroma

n. smell, odor, fragrance

An odor or odour (see spelling differences) is a volatilized chemical compound, generally at a very low concentration, which humans and other animals perceive by the sense of olfaction. Odors are also called smells, which can refer to both pleasant and unpleasant odors. The terms fragrance, scent, or aroma are used primarily by the food and cosmetic industry to describe a pleasant odor, and is sometimes used to refer to perfumes. In contrast, stench, reek, and stink are used specifically to describe unpleasant odor.
See more at Wikipedia.org...

Odor a volatile emanation perceived by the sense of smell. o·dor n. 1. The property or quality of a thing that affects, stimulates, or is perceived [more]Aroma - Community and Resources

Noun
1. any property detected by the olfactory system
(synonym) olfactory property, smell, odor, odour, scent
(hypernym) property
(hyponym) bouquet, fragrance, redolence, sweetness
(attribute) odorous
(derivation) perfume, aromatize, aromatise
2. a distinctive odor that is pleasant
(synonym) fragrance, perfume, scent
(hypernym) smell, odor, odour, olfactory sensation, olfactory perception
(hyponym) incense
(derivation) perfume, aromatize, aromatise

n. aroma, smell, fragrancy, fragrance; flavor, taste, something that adds taste