GNU Collaborative International Dictionary of English

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1.       
   ‖Nematoidea (?), prop. n. pl. [NL., fr. Gr. νῆμα, νήματος, thread + -oid.] (Zool.) A phylum of worms, having a long, round, and generally smooth body; the roundworms.  Called also Nematodea, and more commonly Nematoda.  Formerly, it was classed as a taxonomic order.
   
   [1913 Webster +PJC]
   
   ☞ The trichina, stomach worm, and pinworm of man belong to this group.  See also Vinegar eel, under Vinegar, and Gapeworm.
   
   [1913 Webster]