Prosiphon definitions

Prosiphon

• (n.) A minute tube found in the protoconch of ammonites, and not connected with the true siphon.
Found on http://thinkexist.com/dictionary/meaning/prosiphon/

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Prosiphon

Pro·si'phon noun [ Prefix pro- for + siphon .] (Zoology) A minute tube found in the protoconch of ammonites, and not connected with the true siphon.
Found on http://www.encyclo.co.uk/webster/P/178

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