redia


redia
Intramolluscan development stage of a digenetic trematode, following the primary sporocyst stage, which forms after penetration of the snail tissues by the miracidium. Rediae are produced from cells within the sporocyst, are liberated from the latter, and develop in the tissues of the host snail as elongated, saclike, muscular organisms with a mouth and gut. The rediae may produce one or a number of additional generations in the snail, but they ultimately produce the final development stage, the cercaria. SEE ALSO: sporocyst (1), miracidium. [F. Redi, Italian physician, 1626–1697]

* * *

re·dia 'rēd-ē-ə n, pl re·di·ae -ē-.ē also re·di·as a larva produced within the sporocyst of many trematodes that produces another generation of larvae like itself or develops into a cercaria
re·di·al -ē-əl adj

* * *

n. (pl. rediae)
the third-stage larva of a parasitic fluke. Rediae develop within the body of a freshwater snail and undergo a process of asexual reproduction, giving rise to many fourth-stage larvae called cercaria. See also miracidium, sporocyst.

* * *

re·dia (reґde-ə) pl. reґdiae [F. Redi, Italian naturalist, 1626–1698] a larval stage of certain trematode parasites, which develops in the body of a snail host and gives rise to daughter rediae or to the cercariae.

Medical dictionary. 2011.

Look at other dictionaries:

  • Redia — or redia can be: *A synonym for the plant genus Cleidion of the family Euphorbiaceae *A stage in the development of a trematode …   Wikipedia

  • Redia — Re di*a (r? d?*?), n.; pl. L. {Redi[ae]} ( [=e]), E. {Redias} ( ?z). [NL.; of uncertain origin.] (Zo[ o]l.) A kind of larva, or nurse, which is prroduced within the sporocyst of certain trematodes by asexual generation. It in turn produces, in… …   The Collaborative International Dictionary of English

  • redia — Segunda o tercera etapa larvaria alargada de un trematodo que se desarrolla en un esporocisto y madura a numerosas cercarias. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • redia — [rē′dē ə] n. pl. rediae [rē′dē ē΄] [ModL, after F. Redi, 17th c. It naturalist] a larval stage of many trematodes, usually parasitic in a host snail, produced by a sporocyst and producing daughter rediae or cercariae …   English World dictionary

  • redia — n.; pl. rediae [NL. after Francesco Redi, naturalist] (PLATYHELMINTHES: Trematoda) In Digenea, a larval produced by asexual reproduction within a sporocyst or mother redia …   Dictionary of invertebrate zoology

  • redia — noun (plural rediae; also redias) Etymology: New Latin, from Francesco Redi died 1698? Italian naturalist Date: 1877 a larva produced within the sporocyst of many trematodes that produces another generation of rediae or develops into a cercaria • …   New Collegiate Dictionary

  • redia — /ree dee euh/, n., pl. rediae / dee ee /. Zool. a cylindrical larval stage of some trematodes, produced by a sporocyst and giving rise to daughter rediae or to cercariae. [1875 80; < NL, after F. REDI; see A2] * * * …   Universalium

  • redia — noun the larva of some trematodes, some of which become cercariae …   Wiktionary

  • redia — re·dia …   English syllables

  • redia — n.; pl. rediae the third stage larva of a parasitic fluke. Rediae develop within the body of a freshwater snail and undergo a process of asexual reproduction, giving rise to many fourth stage larvae called cercariae. See also: miracidium,… …   The new mediacal dictionary