Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Vestimentiferan" Definition
noun
Any of various marine tubeworms, including the giant tubeworms, of the phylum vestimentifera, that lack a digestive system, depend on chemoautotrophic bacteria for nutrients, and inhabit areas close to deep sea hydrothermal vents or areas of cold water seeps on continental margins.
Source: American Heritage Dictionary
Any benthic marine tube worm of the phylum vestimentifera.
Source: Wiktionary
Any of a taxonomic group (Vestimentifera) of very large tube worms that may grow to 9 feet (3 meters) in length and more than an inch (3 centimeters) in diameter, are found especially near deep-sea hydrothermal vents, and are considered pogonophorans or a separate phylum or polychaetes.
Source: Merriam-Webster
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