What does "agrimony" mean?

Agrimony: (a) A genus of plants of the Rose family. (b) The name is also given to various other plants; as, hemp agrimony (Eupatorium cannabinum); water agrimony (Bidens). Note: The Agrimonia eupatoria, or common agrimony, a perennial herb with a spike of yellow flowers, was once esteemed as a medical remedy, but is now seldom used.