nematode n 1: unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic [syn: {nematode}, {nematode worm}, {roundworm}]
nematode \nem"a*tode\, a. (Zool.) Same as {Nematoid}. [1913 Webster]
nematode \nem"a*tode\, n. (Zool.) Any worm of the phylum Nematoda; a roundworm; -- they are unsegmented worms having a cylindrical elongated body. They may live freely in soil or water, or as parasites in plants or animals. [PJC]