<p><strong>Noun</strong></p><ul><li>A variant of calamus.</li><li>The sweet flag, <em>Acorus calamus</em>.</li><li>Its aromatic root.</li><li>Any of various tropical Asian palms of the genus <em>Calamus</em>, some of which are a source of rattan.</li><li>The hollow base of a feather; a quill.</li></ul>