calamus

noun cal·a·mus \ ˈka-lə-məs \

Definition of calamus

plural calami play \-ˌmī, -ˌmē\
1 a :sweet flag
b :the aromatic peeled and dried rhizome of the sweet flag that is the source of a carcinogenic essential oil
2 :the hollow basal portion of a feather below the vane :quill

Origin and Etymology of calamus

Latin, reed, reed pen, from Greek kalamos — more at haulm


Medical Dictionary

calamus

noun cal·a·mus \ ˈkal-ə-məs \

medical Definition of calamus

plural calami play \-ˌmī, -ˌmē\
2 :the aromatic peeled and dried rhizome of the sweet flag that is the source of a carcinogenic essential oil

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