Calamus may refer to:
Botany and zoology
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
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 (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 character from the 2014 puzzle/adventure game OneShot
See also
Calamis (disambiguation)