miracidium

mi·ra·cid·i·um

M5353450 (mîr′ə-sĭd′ē-əm, mī′rə-)n. pl. mi·ra·cid·i·a (-ē-ə) A ciliated larva of a digenetic trematode, which hatches from the egg and enters the first intermediate host, where it develops into a sporocyst or a redia.

[German, from Greek *meirakidion (attested in Latin as mīracidion, one in early adolescence), diminutive of meirax, young girl, young person, lad.]

mi′ra·cid′i·al adj.

miracidium

(ˌmaɪrəˈsɪdɪəm) n, pl -ia (-ɪə) (Animals) the flat ciliated larva of flukes that hatches from the egg and gives rise asexually to other larval forms[C20: New Latin, via Late Latin miracidion, from Greek meirax boy, girl] ˌmiraˈcidial adj

Miracidium

miracidium

[‚mī·rə′sid·ē·əm] (invertebrate zoology) The ciliated first larva of a digenetic trematode; forms a sporocyst after penetrating intermediate host tissues.

Miracidium

the first larva in the development of trematodes, parasitic flatworms. The elongated body is 0.03 to 0.3 mm long and clad in large ciliated cells, which are usually distributed in four to six longitudinal rows. At the anterior of the body open the penetrative glands (a vestige of the intestine that has changed its primary function), whose secretions facilitate implantation of the miracidium in the body of the intermediate host. The organism’s nervous system is represented by the anterior medullary mass of nerve cells. The miracidia of many species have an X-shaped pigmented ocellus in front. The excretory organs are a pair of protonephridia. The body cavity contains germ cells. Miracidia usually emerge from the egg in water, swim for a time, and then implant themselves in the body of an intermediate host (usually a mollusk), where they are transformed into sporocysts.

miracidium

[mi″rah-sid´e-um] (Gr.) the free-swimming larva of a trematode parasite which emerges from an egg and penetrates the body of a snail host.

mi·ra·cid·i·um

, pl.

mi·ra·cid·i·a

(mī'ră-sid'ē-ŭm, -ă), The ciliated first-stage larva of a trematode that emerges from the egg and must penetrate into the tissues of an appropriate intermediate host snail if it is to continue its life cycle; followed by development into a mother sporocyst and by production of a number of offspring of successive larval generations.
See also: sporocyst (1). [G. meirakidion, boy]

miracidium

(mîr′ə-sĭd′ē-əm, mī′rə-)n. pl. miracid·ia (-ē-ə) A ciliated larva of a digenetic trematode, which hatches from the egg and enters the first intermediate host, where it develops into a sporocyst or a redia.

mi′ra·cid′i·al adj.

miracidium

The first-stage larva of a fluke such as Schistosoma species Fasciolopsis or Chlonorchis species. Miracidia are released into water in human excreta and invade particular water snails in which the second-stage larvae (sporocysts) form. These release thousands of cercariae, the form that can pass through the skin to infect humans.

miracidium

(pl. miracidia) the first larval form of a liver- or blood- FLUKE, which develops from the egg as a flat free-swimming, ciliated larva.

Miracidium (plural, miracidia)

The free-swimming larval form in the life cycle of the liver fluke.Mentioned in: Fluke Infections, Schistosomiasis

单词	miracidium
释义	miracidium mi·ra·cid·i·um M5353450 (mîr′ə-sĭd′ē-əm, mī′rə-)n. pl. mi·ra·cid·i·a (-ē-ə) A ciliated larva of a digenetic trematode, which hatches from the egg and enters the first intermediate host, where it develops into a sporocyst or a redia. [German, from Greek meirakidion (attested in Latin as mīracidion, one in early adolescence), diminutive of meirax, young girl, young person, lad.] mi′ra·cid′i·al* adj. miracidium (ˌmaɪrəˈsɪdɪəm) n, pl -ia (-ɪə) (Animals) the flat ciliated larva of flukes that hatches from the egg and gives rise asexually to other larval forms[C20: New Latin, via Late Latin miracidion, from Greek meirax boy, girl] ˌmiraˈcidial adj Miracidium miracidium [‚mī·rə′sid·ē·əm] (invertebrate zoology) The ciliated first larva of a digenetic trematode; forms a sporocyst after penetrating intermediate host tissues. Miracidium the first larva in the development of trematodes, parasitic flatworms. The elongated body is 0.03 to 0.3 mm long and clad in large ciliated cells, which are usually distributed in four to six longitudinal rows. At the anterior of the body open the penetrative glands (a vestige of the intestine that has changed its primary function), whose secretions facilitate implantation of the miracidium in the body of the intermediate host. The organism’s nervous system is represented by the anterior medullary mass of nerve cells. The miracidia of many species have an X-shaped pigmented ocellus in front. The excretory organs are a pair of protonephridia. The body cavity contains germ cells. Miracidia usually emerge from the egg in water, swim for a time, and then implant themselves in the body of an intermediate host (usually a mollusk), where they are transformed into sporocysts. miracidium miracidium [mi″rah-sid´e-um] (Gr.) the free-swimming larva of a trematode parasite which emerges from an egg and penetrates the body of a snail host. mi·ra·cid·i·um , pl. mi·ra·cid·i·a (mī'ră-sid'ē-ŭm, -ă), The ciliated first-stage larva of a trematode that emerges from the egg and must penetrate into the tissues of an appropriate intermediate host snail if it is to continue its life cycle; followed by development into a mother sporocyst and by production of a number of offspring of successive larval generations. See also: sporocyst (1). [G. meirakidion, boy] miracidium (mîr′ə-sĭd′ē-əm, mī′rə-)n. pl. miracid·ia (-ē-ə) A ciliated larva of a digenetic trematode, which hatches from the egg and enters the first intermediate host, where it develops into a sporocyst or a redia. mi′ra·cid′i·al adj. miracidium The first-stage larva of a fluke such as Schistosoma species Fasciolopsis or Chlonorchis species. Miracidia are released into water in human excreta and invade particular water snails in which the second-stage larvae (sporocysts) form. These release thousands of cercariae, the form that can pass through the skin to infect humans. miracidium (pl. miracidia) the first larval form of a liver- or blood- FLUKE, which develops from the egg as a flat free-swimming, ciliated larva. Miracidium (plural, miracidia) The free-swimming larval form in the life cycle of the liver fluke.Mentioned in: Fluke Infections, Schistosomiasis ThesaurusSeecercaria
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