miracidiumn.

Brit.

/ˌmʌɪrəˈsɪdɪəm/, U.S.

/ˌmaɪ(ə)rəˈsɪdiəm/

Inflections: Plural miracidia.

Origin: A borrowing from German. Etymon: German Miracidium.

Etymology: < German Miracidium (H. Braun 1893, in Bronn's Klassen u. Ordnungen des Thier-Reichs: Vermes I. 776) < Hellenistic Greek μειρακίδιον boy, lad < ancient Greek μειρακ- , μεῖραξ girl, lass, (in Hellenistic Greek use) boy, cognate with a group of words for young men and women (see marry v.) + -ίδιον -idium comb. form. Hellenistic Greek μειρακίδιον > classical Latin mīracidion youth (only recorded in an 8th–cent. epitome). Compare also ancient Greek μειράκιον boy, lad. Compare miracidial adj.

Zoology.

A digenean trematode (parasitic fluke) in the ciliated free-swimming larval stage, in which form it passes from the definitive host to the first intermediate host (typically a snail), forming a sporocyst. Cf. Cercaria n.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Platyhelminthes > [noun] > class Trematodes > member of > first larval form of

miracidium1898

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Platyhelminthes > [noun] > class Trematodes > order Digenea > member of

miracidium1898

digenean1963

1898 A. Sedgwick Student's Text-bk. Zool. I. v. 229 The miracidium generally becomes a sporocyst, rarely a redia.

1904 C. W. Stiles Illustr. Key to Trematode Parasites of Man 18 Miracidium ciliated, develops after eggs leave the host.

1952 J. Clegg Freshwater Life Brit. Isles viii. 127 The miracidium stage [of Bucephalus] is passed in the freshwater Mussels Anodonta and Unio.

1963 New Scientist 29 Aug. 441/3 Those [schistosome] eggs which reach the outside world hatch in fresh water and the microscopic miracidia which emerge swim around.

1971 Oxf. Bk. Invertebr. 24/1 When the pasture is damp, the first larva [of the liver fluke], the miracidium, hatches and this swims by its cilia in the film of water on the pasture until it encounters a snail.

1988 J. C. Bell et al. Zoonoses 86 Adult parasites in the bile ducts lay eggs which pass into the faeces. On hatching the miracidium enters the intermediate host which is usually a snail, Lymnaea truncatula.

This entry has been updated (OED Third Edition, March 2002; most recently modified version published online March 2022).

单词	miracidium
释义	miracidiumn. Brit. /ˌmʌɪrəˈsɪdɪəm/, U.S. /ˌmaɪ(ə)rəˈsɪdiəm/ Inflections: Plural miracidia. Origin: A borrowing from German. Etymon: German Miracidium. Etymology: < German Miracidium (H. Braun 1893, in Bronn's Klassen u. Ordnungen des Thier-Reichs: Vermes I. 776) < Hellenistic Greek μειρακίδιον boy, lad < ancient Greek μειρακ- , μεῖραξ girl, lass, (in Hellenistic Greek use) boy, cognate with a group of words for young men and women (see marry v.) + -ίδιον -idium comb. form. Hellenistic Greek μειρακίδιον > classical Latin mīracidion youth (only recorded in an 8th–cent. epitome). Compare also ancient Greek μειράκιον boy, lad. Compare miracidial adj. Zoology. A digenean trematode (parasitic fluke) in the ciliated free-swimming larval stage, in which form it passes from the definitive host to the first intermediate host (typically a snail), forming a sporocyst. Cf. Cercaria n. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Platyhelminthes > [noun] > class Trematodes > member of > first larval form of miracidium1898 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Platyhelminthes > [noun] > class Trematodes > order Digenea > member of miracidium1898 digenean1963 1898 A. Sedgwick Student's Text-bk. Zool. I. v. 229 The miracidium generally becomes a sporocyst, rarely a redia. 1904 C. W. Stiles Illustr. Key to Trematode Parasites of Man 18 Miracidium ciliated, develops after eggs leave the host. 1952 J. Clegg Freshwater Life Brit. Isles viii. 127 The miracidium stage [of Bucephalus] is passed in the freshwater Mussels Anodonta and Unio. 1963 New Scientist 29 Aug. 441/3 Those [schistosome] eggs which reach the outside world hatch in fresh water and the microscopic miracidia which emerge swim around. 1971 Oxf. Bk. Invertebr. 24/1 When the pasture is damp, the first larva [of the liver fluke], the miracidium, hatches and this swims by its cilia in the film of water on the pasture until it encounters a snail. 1988 J. C. Bell et al. Zoonoses 86 Adult parasites in the bile ducts lay eggs which pass into the faeces. On hatching the miracidium enters the intermediate host which is usually a snail, Lymnaea truncatula. This entry has been updated (OED Third Edition, March 2002; most recently modified version published online March 2022). < n.1898
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