Definition

Noun: 1. An essential oil distilled from the leaves of the pennyroyal plant (Mentha pulegium or Hedeoma pulegioides), characterized by a strong, mint-like aroma. It has been used historically in traditional medicine and as a fragrance in products like soaps.

Usage

• Pennyroyal oil is known for its potent, minty scent.
• Due to its historical use and strong properties, pennyroyal oil should be handled with caution.
• The commercial product often specifies whether it is derived from the European or American pennyroyal plant.

Examples

• The soap was scented with a small amount of pennyroyal oil.
• Pennyroyal oil has a much stronger aroma than typical peppermint oil.
• Historically, pennyroyal oil was used in folk remedies, but its use is now strongly discouraged due to safety concerns.

Advanced Usage

• Cautionary Note: Pennyroyal oil is highly toxic if ingested and can cause severe liver damage and other serious health effects. It is not safe for internal use or for use in aromatherapy without extreme, expert dilution and knowledge. Its primary modern use is as a historical point of reference or in very controlled industrial fragrance applications.

Variants and Related Words

• Pennyroyal (noun): The plant from which the oil is derived.
• Essential oil (noun): A concentrated hydrophobic liquid containing volatile aroma compounds from plants, the category to which pennyroyal oil belongs.

Synonyms

• Mentha pulegium oil
• Hedeoma oil (specifically for the American variety)

Notes on Different Meanings

The term "pennyroyal oil" refers specifically to the extracted essential oil. It does not refer to the fresh or dried plant material (which is simply "pennyroyal"), nor to any infused or carrier oil that may have pennyroyal leaves steeped in it. The definition is precise to the distilled product.

Noun

1. aromatic oil from American pennyroyal
2. oil from European pennyroyal having an odor like mint; used chiefly in soaps