Definition of miracidium in English:

miracidium

Syllabification: mi·ra·cid·i·um
Pronunciation: /ˌmīrəˈsidēəm
 
/

noun (plural miracidia /-sidēə/)

Zoology
A free-swimming ciliated larval stage in which a parasitic fluke passes from the egg to its first host, typically a snail.
More example sentences
  • Generally, host seeking by miracidia includes a complicated behavioral process that is initiated through a combination of light and gravity stimuli.
  • Not only do P. sinitsini become adults in E. symmetrica, but eggs are produced and hatch inside the daughter sporocysts, releasing free-swimming miracidia.
  • Larval stages of some medically important species include miracidium, redia, cercaria, and metacercaria.

Origin

late 19th century: from Greek meirakidion, diminutive of meirakion 'boy, stripling'.

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