1. Plural of arnica; plants of the genus Arnica, typically with yellow flowers, native to mountainous regions.
Usage: botanical term; often used in herbal medicine
2. Plural of arnica; preparations or extracts made from arnica plants, used topically for bruises and inflammation.
Usage: medicinal/herbal use

Examples

• The hikers found several arnicas blooming on the mountainside.
• She applied arnicas to her bruised knee after the fall.
• Many natural remedies contain arnicas as a key ingredient.
• The garden featured a collection of rare arnicas from the Alps.
• Arnicas are popular in homeopathic medicine for treating minor injuries.