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Cercaria :: Cercaria (n.) The larval form of a trematode worm having the shape of a tadpole, with its body terminated by a tail-like appendage..

Platyelminthes :: Platyelminthes (n. pl.) A class of helminthes including the cestodes, or tapeworms, the trematodes, and the turbellarians. Called also flatworms..

Vitellogene :: Vitellogene (n.) A gland secreting the yolk of the eggs in trematodes, turbellarians, and some other helminths..

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..

Trematode :: Trematode (n.) One of the Trematodea. Also used adjectively.

Gynaecophore :: Gynaecophore (n.) A ventral canal or groove, in which the males of some di/cious trematodes carry the female. See Illust. of Haematozoa..

Sporozoa :: Sporosac (n.) An early or simple larval stage of trematode worms and some other invertebrates, which is capable or reproducing other germs by asexual generation; a nurse; a redia..

Trematoid :: Trematoid (a.) Of or pertaining to the Trematodea. See Illustration in Appendix.

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

Tristoma :: Tristoma (n.) Any one of numerous species of trematode worms belonging to Tristoma and allied genera having a large posterior sucker and two small anterior ones. They usually have broad, thin, and disklike bodies, and are parasite on the gills and skin of fishes..

Polystomata :: Polystomata (n. pl.) A division of trematode worms having more two suckers. Called also Polystomea and Polystoma.

Haematozoon :: Haematozoon (n.) The trematode, Bilharzia haematobia, which infests the inhabitants of Egypt and other parts of Africa, often causing death..

Ootype :: Ootype (n.) The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell.

Proscolex :: Proscolex (n.) An early larval form of a trematode worm; a redia. See Redia.

Sporocyst :: Sporocyst (n.) An asexual zooid, usually forming one of a series of larval forms in the agamic reproduction of various trematodes and other parasitic worms. The sporocyst generally develops from an egg, but in its turn produces other larvae by internal budding, or by the subdivision of a part or all of its contents into a number of minute germs. See Redia..

Redia :: Redia (n.) A kind of larva, or nurse, which is prroduced within the sporocyst of certain trematodes by asexual generation. It in turn produces, in the same way, either another generation of rediae, or else cercariae within its own body. Called also proscolex, and nurse. See Illustration in Appendix..

Water Tube :: Water tube () One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst..

Nurse :: Nurse (n.) A peculiar larva of certain trematodes which produces cercariae by asexual reproduction. See Cercaria, and Redia..

Cirrus :: Cirrus (n.) The external male organ of trematodes and some other worms, and of certain Mollusca..

Distoma :: Distoma (n.) A genus of parasitic, trematode worms, having two suckers for attaching themselves to the part they infest. See 1st Fluke, 2..

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