'Phragmocone' definitions:

Definition of 'phragmocone'

(from WordNet)
noun
The thin conical chambered internal shell (either straight or curved) of a belemnite [syn: phragmocone, phragmacone]

Definition of 'Phragmocone'

From: GCIDE
  • Phragmocone \Phrag"mo*cone\, n. [Gr. ?, ?, a fence, an inclosure + ? a cone.] (Zool.) The thin chambered shell attached to the anterior end of a belemnite. [Written also phragmacone.] [1913 Webster]