Webster’s Revised Unabridged Dictionary · 1913
Prosiphon
Pro·si′phon (prō·sī′fŏn), n. [Pref. pro- for + siphon.] (Zoöl.) A minute tube found in the protoconch of ammonites, and not connected with the true siphon.
Webster’s Revised Unabridged Dictionary · 1913
Pro·si′phon (prō·sī′fŏn), n. [Pref. pro- for + siphon.] (Zoöl.) A minute tube found in the protoconch of ammonites, and not connected with the true siphon.