Essential oil is a natural product extracted from a single plant species. Not all plants produce essential oils, and in the plants that do, the essential oil may be found in the roots, stems, leaves, flowers, or fruits young living.
Basically, these terms mean the same thing. We think the term "aromatherapy" is a bit of a misnomer because it implies that all essential oils smell nice. On the contrary, there are many essential oils that do not have a pleasant odor.
Essential oils are produced by steam or water distillation of the leaves, wood, petals, buds, needles, bark or roots of aromatic botanicals such as lavender, rosemary, cedarwood, rose, peppermint and cypress. While most essential oils are water or hydro distilled, citrus essential oils are either cold pressed or steam distilled from the rinds of citrus fruits.