| calamus scriptorius | Inferior part of the rhomboid fossa; the narrow lower end of the fourth ventricle between the two clavae. Synonym: Arantius' ventricle. Origin: L. Writing pen (05 Mar 2000) |
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| calamus | 1. The dried, unpeeled rhizome of Acorus calamus (family Araceae), cultivated in Burma and Sri Lanka, a carminative and anthelminthic. 2. A reed-shaped structure. Origin: L. Reed, a pen (05 Mar 2000) |
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