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aroma (n.)

early 13c., "fragrant substance, spice" (a sense now obsolete), from Latin aroma "sweet odor," from Greek aroma "seasoning, a spice or sweet herb," which is of unknown origin. Meaning "fragrance, odor," especially an agreeable one, is from 1814. A hypercorrect plural is aromata. Related: Aromal.

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Definitions of aroma from WordNet

aroma (n.)
any property detected by the olfactory system;
Synonyms: olfactory property / smell / odor / odour / scent
aroma (n.)
a distinctive odor that is pleasant;
Synonyms: fragrance / perfume / scent
From wordnet.princeton.edu