aromatherapy oils

Some of the materials employed include:

* Essential oils: Fragrant oils extracted from plants chiefly through steam distillation (e.g. eucalyptus oil) or expression (grapefruit oil). However, the term is also occasionally used to describe fragrant oils extracted from plant material by any solvent extraction.
* Absolutes: Fragrant oils extracted primarily from flowers or delicate plant tissues through solvent or supercritical fluid extraction (e.g. rose absolute). The term is also used to describe oils extracted from fragrant butters, concretes, and enfleurage pommades using ethanol.
* Phytoncides: Various volatile organic compounds from plants that kill microbes[citation needed]. Many terpene-based fragrant oils and sulfuric compounds from plants in the genus "Allium" are phytoncides[citation needed], though the latter are likely less commonly used in aromatherapy due to their disagreeable odors.
* Herbal distillates or hydrosols: The aqueous by-products of the distillation process (e.g. rosewater). There are many herbs that make herbal distillates and they have culinary uses, medicinal uses and skin care uses[citation needed]. Common herbal distillates are rose, lemon balm and chamomile.
* Infusions: Aqueous extracts of various plant material (e.g. infusion of chamomile)
* Carrier oils: Typically oily plant base triacylglycerides that dilute essential oils for use on the skin (e.g. sweet almond oil)
* Vaporizer (Volatized) Raw Herbs: Typically higher oil content plant based materials dried, crushed, and heated to extract and inhale the aromatic oil vapors in a direct inhalation modality