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Pediculus :: Pediculus (n.) A genus of wingless parasitic Hemiptera, including the common lice of man. See Louse..

Trachymedusae :: Trachymedusae (n. pl.) A division of acalephs in which the development is direct from the eggs, without a hydroid stage. Some of the species are parasitic on other medusae..

Tick :: Tick (n.) Any one of numerous species of large parasitic mites which attach themselves to, and suck the blood of, cattle, dogs, and many other animals. When filled with blood they become ovate, much swollen, and usually livid red in color. Some of the species often attach themselves to the human body. The young are active and have at first but six legs..

Trematodea :: Trematodea (n. pl.) An extensive order of parasitic worms. They are found in the internal cavities of animals belonging to all classes. Many species are found, also, on the gills and skin of fishes. A few species are parasitic on man, and some, of which the fluke is the most important, are injurious parasites of domestic animals. The trematodes usually have a flattened body covered with a chitinous skin, and are furnished with two or more suckers for adhesion. Most of the species are hermaphrodi

Scolex :: Scolex (n.) The embryo produced directly from the egg in a metagenetic series, especially the larva of a tapeworm or other parasitic worm. See Illust. of Echinococcus..

Spongiae :: Sponger (n.) Fig.: A parasitical dependent; a hanger-on.

Siphonostomata :: Siphonostomata (n. pl.) A tribe of parasitic copepod Crustacea including a large number of species that are parasites of fishes, as the lerneans. They have a mouth adapted to suck blood..

Entorganism :: Entorganism (n.) An internal parasitic organism.

Branchiura :: Branchiura (n. pl.) A group of Entomostraca, with suctorial mouths, including species parasitic on fishes, as the carp lice (Argulus)..

Strongyloid :: Strongyloid (a.) Like, or pertaining to, Strongylus, a genus of parasitic nematode worms of which many species infest domestic animals. Some of the species, especially those living in the kidneys, lungs, and bronchial tubes, are often very injurious..

Trichina :: Trichina (n.) A small, slender nematoid worm (Trichina spiralis) which, in the larval state, is parasitic, often in immense numbers, in the voluntary muscles of man, the hog, and many other animals. When insufficiently cooked meat containing the larvae is swallowed by man, they are liberated and rapidly become adult, pair, and the ovoviviparous females produce in a short time large numbers of young which find their way into the muscles, either directly, or indirectly by means of the blood. Their

Fluke :: Fluke (n.) A parasitic trematode worm of several species, having a flat, lanceolate body and two suckers. Two species (Fasciola hepatica and Distoma lanceolatum) are found in the livers of sheep, and produce the disease called rot..

Smut :: Smut (v. t.) An affection of cereal grains producing a swelling which is at length resolved into a powdery sooty mass. It is caused by parasitic fungi of the genus Ustilago. Ustilago segetum, or U. Carbo, is the commonest kind; that of Indian corn is Ustilago maydis..

Parasite :: Parasite (n.) An animal which steals the food of another, as the parasitic jager..

Arrhizous :: Arrhizous (a.) Destitute of a true root, as a parasitical plant..

Parasita :: Parasita (n. pl.) An artificial group formerly made for parasitic insects, as lice, ticks, mites, etc..

Pulex :: Pulex (n.) A genus of parasitic insects including the fleas. See Flea.

Linguatulina :: Linguatulina (n. pl.) An order of wormlike, degraded, parasitic arachnids. They have two pairs of retractile hooks, near the mouth. Called also Pentastomida..

The Gapes :: The gapes () A disease of young poultry and other birds, attended with much gaping. It is caused by a parasitic nematode worm (Syngamus trachealis), in the windpipe, which obstructs the breathing. See Gapeworm..

Rafflesia :: Rafflesia (n.) A genus of stemless, leafless plants, living parasitically upon the roots and stems of grapevines in Malaysia. The flowers have a carrionlike odor, and are very large, in one species (Rafflesia Arnoldi) having a diameter of two or three feet..

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