Pogonophora, Pogophoran 1. Any of various wormlike marine invertebrates of the phylum Pogonophora that grow in upright chitin tubes, usually at great depths in the various seas off continents and large islands. 2. Pogonophorans have tentacles that are often featherlike, or like hairs of a beard, which are attached to the head region or anterior en... Found on http://www.wordinfo.info/words/index/info/view_unit/1716/2