trefoil

noun

1. any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves

Similar word(s): medic, medick

Definition categories: plant, herb

2. a plant of the genus Trifolium

Similar word(s): clover

Definition categories: plant, herb

3. an architectural ornament in the form of three arcs arranged in a circle

Definition categories: man–made