Definitions

1. noun

A type of lichen (Usnea barbata) used in traditional medicine to treat various ailments, especially respiratory issues.

“The herbalist suggested using usnea to soothe the patient’s cough.”

2. noun

A genus of lichens in the family Parmeliaceae, characterized by their long, hair-like branches.

“The botanist studied the unique usnea species found in the Arctic region.”