[nem-uh-tuh-sist, ni-mat-uh-] /ˈnɛm ə təˌsɪst, nɪˈmæt ə-/
an organ in coelenterates consisting of a minute capsule containing an ejectable thread that causes a sting.
a structure in coelenterates, such as jellyfish, consisting of a capsule containing a hollow coiled thread that can be everted to sting or paralyse prey and enemies
1875, from nemato-, comb. form of Greek nema, nematos “thread” (genitive nematos), from stem of nein “to spin” (see needle (n.)) + cyst.
nematocyst nem·a·to·cyst (něm’ə-tə-sĭst’, nə-māt’ə-)
A capsule within specialized cells of certain coelenterates containing a barbed, threadlike tube that delivers a paralyzing sting.
One of the minute capsules in the tentacles of cnidarians, such as jellyfish, hydras, or sea anemones, used for stinging. The capsule is produced by a special cell (called a cnidoblast) and contains a tightly coiled barbed thread that quickly shoots forth if the capsule’s lid is disturbed. The thread often contains poison.
a class of worms, Modern Latin compound of nemat- “thread” (from Greek nema, genitive nematos “thread,” from stem of nein “to spin;” see needle (n.)) + -odes “like, of the nature of” (see -oid). Nematoda Nem·a·to·da (něm’ə-tō’də) n. A phylum of worms including species parasitic in humans and plants as well as free-living nonparasitic species […]
[nem-uh-tohd] /ˈnɛm əˌtoʊd/ noun 1. any unsegmented worm of the phylum Nematoda, having an elongated, cylindrical body; a roundworm. adjective 2. pertaining to the Nematoda. /ˈnɛməˌtəʊd/ noun 1. any unsegmented worm of the phylum (or class) Nematoda, having a tough outer cuticle. The group includes free-living forms and disease-causing parasites, such as the hookworm and […]
nematodiasis nem·a·to·di·a·sis (něm’ə-tō-dī’ə-sĭs) n. Infection with nematode parasites.
[nem-uh-tol-uh-jee] /ˌnɛm əˈtɒl ə dʒi/ noun 1. the branch of zoology dealing with nematodes.