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The Collaborative International Dictionary
Siphoniferous

Siphoniferous \Si"phon*if"er*ous\, a. [Siphon + -ferous.] (Zo["o]l.) Siphon-bearing, as the shell of the nautilus and other cephalopods.

Wiktionary
siphoniferous

a. (context zoology English) siphon-bearing.