Calamus

Calamus may refer to:

==Biology== Calamus (fish), a genus of fish in the family Sparidae Calamus (palm), a genus of rattan palms Calamus, the hollow shaft of a feather, also known as the quill Calamus scriptorius, a part of the rhomboid fossa Acorus calamus, the sweet flag, a tall wetland plant, commonly referred to as calamus in herbal medicine