An old name for the nematode genus Dracunculus, properly applied to members of the phylum Nematomorpha, commonly called the gordian or horsehair worms, hair worms, or hair snakes.
[L., fr. G. Gordios, king of Gordium in Phrygia; an allusion to the knotlike twistings of these worms]
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Examples: glitazone, GI cocktail, etc.