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
Place names Calamus, Iowa, United States Calamus, Wisconsin, United States Calamus Creek (disambiguation) Calamus Swamp, Ohio, United States
Other uses Calamus, another name of fistula (liturgical object) Calamus (pen), an ancient reed-pen Calamus (DTP), a desktop publishing application Calamus (poems), a series of poems by American writer Walt Whitman Calamus Ensemble, a classical music ensemble featuring Roberto Carnevale Ensemble Cálamus, a classical music ensemble featuring Eduardo Paniagua USS Calamus (AOG-5) a Mettawee-class gasoline tanker acquired by the U.S. Navy Calamus or Kalamos, a figure in Greek mythology Calamus, a fictional character from surreal puzzle adventure video game OneShot
See also Calamis (disambiguation)