What is the meaning of Calamus?

The sweet flag, Acorus calamus.

A quill; the hard, horny, hollow, and more or less transparent part of the stem or scape of a feather.

A fish of genus Calamus in family Sparidae; certain porgies.

A palm in genus Calamus, of rattan palms.

Synonym of fistula (tube for sucking Eucharist wine).

a reed, cane

an object made from a reed, such as a reed pen, arrow, or fishing rod

a stalk, straw, blade

the hollow arm of a candelabrum

a whistle or musical pipe; sometimes specifically a blown pipe with tone holes

Source: wiktionary.org