miracidium

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mi·ra·cid·i·um

 (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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Because we did not attempt miracidial hatching during this study, we cannot confirm that these hybrids or introgressed forms are fully viable in autochthonous natural transmission.
The outcome of the snail/schistosome interaction is governed by the genetic make-up of both the snail and parasite, with successful miracidial development occurring only in susceptible/compatible but not resistant/incompatible snails (Lewis, Patterson, & Gizywarz, 2002).This considerable degree of intraspecific polymorphism requires investigating variability related factors to susceptibility or resistance in Biomphalaria.
Behavioural parasitology and perspectives on miracidial host finding.