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Any of several small, wormlike marine animals of the phylum Phoronida that have a U-shaped digestive tract and inhabit self-made chitinous tubes.

[From New Latin Phorōnida, phylum name, from Phorōnis, type genus, probably from Latin, Phoronean, Argive (name of Io, priestess of Argos), from Phorōneus, son of Inachus, king of Argos, from Greek.]

pho·ro′nid adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) a small, wormlike marine animal which usually lives in the mud of the sea bottom and is hermaphrodite. Also commonly called: horseshoe worm
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phoronid - hermaphrodite wormlike animal living in mud of the sea bottom
invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
Phoronida, Phoronidea, phylum Phoronida - small phylum of wormlike marine animals
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