calamus
     n 1: any tropical Asian palm of the genus Calamus; light tough
          stems are a source of rattan canes
     2: the aromatic root of the sweet flag used medicinally
     3: perennial marsh plant having swordlike leaves and aromatic
        roots [syn: {sweet flag}, {sweet calamus}, {myrtle flag},
        {flagroot}, {Acorus calamus}]
     4: a genus of Sparidae [syn: {genus Calamus}]
     5: the hollow shaft of a feather [syn: {quill}, {shaft}]
     [also: {calami} (pl)]
Source: WordNet® 2.0