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Glossary

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Essential Oil:

a volatile and aromatic liquid (sometimes semi-solid), which generally constitutes the odorous principles of a plant. It is obtained by a process of expression or distillation from a single botanical form or species.

Ester:

a chemical compound produced by the reaction between an acid and an alcohol with the elimination of a molecule of water.

Estrogen:

a hormone produced by the ovary, necessary for the development of female secondary sexual characteristics.

Exfoliant:

materials with irregular, somewhat scratchy textures, used to release debris that collects on the skin's surface.

Expectorant:

helps promote the removal of mucus from the respiratory system.