A combining form from Gr. nh^ma, nh`matos, a thread. [ 1913 Webster ]

n. [ Nemato- + -blast. ] (Biol.) A spermatocyte or spermoblast. [ 1913 Webster ]

‖n.; pl. Nematocalyces E. Nematocalyxes [ NL. See Nemato-, and Calyx. ] (Zool.) One of a peculiar kind of cups, or calicles, found upon hydroids of the family Plumularidae. They contain nematocysts. See Plumularia. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. nh^ma, nh`matos, a thread + ke`ras horn. ] (Zool.) A suborder of dipterous insects, having long antennae, as the mosquito, gnat, and crane fly; -- called also Nemocera. [ 1913 Webster ]

a. Having the property of killing nematodes; lethal to nematodes. [ Also spelled nematicidal. ] [ PJC ]

n. A substance that kills nematodes, especially one used in medicine or to kill plant pathogens. [ Also spelled nematicide. ] [ PJC ]

n. [ Nemato- + cyst. ] (Zool.) A lasso cell, or thread cell. See Lasso cell, under Lasso. [ 1913 Webster ]

prop. n. pl. (Zool.) A phylum of worms, having a long, round, and generally smooth body; the roundworms. They are mostly parasites, in plants and animals, but some are free-living in soil or water. Also called Nematoidea. [ 1913 Webster +PJC ]

a. (Zool.) Same as Nematoid. [ 1913 Webster ]

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 ]