It is the tuning of all the components of a perfume so that no single element in any phase of the fragrance evaporation becomes so prominent that it could be considered unpleasant. It is easy to achieve harmony between similar smelling substances but quite difficult between the contrasting elements which are often introduced into a perfume to give originality and character. Bringing these warring elements into harmony is a challenging task for the perfumer.

These notes are used mainly in "Nature" fragrances, in different ranges of application-for instance, in medicinal bath-products. Masculine perfumes also can contain hay-like components (Fougere). The synthetic substance with a hay-like odor that is most important in the industry is coumarin.

Many fragrance substances have herbaceous components, and are reminiscent of herbs and drugs. Well-known, and often-used examples are mugwort, sage, rosemary and lavender. Herbaceous accents are widely used in masculine perfumes.

The heart is the second, middle phase of a perfume's fragrance evaporation, occurring after the top note fades away. It is mainly produced by floral, spicy or woody components and represents, as its name indicates, the heart of the perfume.

Fragrances in which the least-volatile ingredients such as mosses and animal notes dominate are called heavy perfumes. Since these ingredients are part of the top note, a heavy perfume can be identified as such at first impact. Heavy substances are used predominantly in chypre notes

A method of "capturing" the odor of a substance using an apparatus resembling a bell-jar. This has allowed perfumers to mimic the notes of flowers, plants, and foods which do not lend themselves otherwise to extraction.

Synthetic said to have a "diffusive jasmine" scent.

Botanically speaking, this refers to more than one type of flower, but in perfumery, it refers to flowers of the family heliotropium, which are said to have a strong, sweet vanilla-like fragrance with undertones of almond.

A general term for citrus oils.