A fragrance wheel is a tool for understanding the relationships between different olfactory categories. Remember the color wheel from art class? It's a similar concept.
Olfactory: of, or relating to, the sense of smell
The fragrance wheel applies to both fragrances as a whole, as well as individual fragrance notes. Fragrance oils generally contain several, or more, notes that make up the complete fragrance. We’ll talk more about fragrance notes a little further down.
For the purposes of this article, when we refer to “scents” we’re talking about a fragrance oil as a whole; when we refer to “notes,” we’re talking about individual fragrance notes that make up a complete fragrance.