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[mahy-ruh-sid-ee-uh m] /ˌmaɪ rəˈsɪd i əm/
noun, plural miracidia
[mahy-ruh-sid-ee-uh] /ˌmaɪ rəˈsɪd i ə/ (Show IPA)
the larva that hatches from the egg of a trematode worm or fluke.
Origin of miracidium
1895-1900; < New Latin, equivalent to mirac- (< Greek meirak- (stem of meîrax) boy, girl) + -idium -idium
Related forms
miracidial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for miracidium
  • Within the egg a miracidium develops and, when fully developed, hatches.
  • The miracidium finds a suitable first intermediate host, a freshwater snail, and penetrates the foot.
  • Here they hatch into a free-swimming stage called a miracidium.
  • The miracidium swims in search of a proper second host animal, a particular type of snail.
British Dictionary definitions for miracidium


noun (pl) -ia (-ɪə)
the flat ciliated larva of flukes that hatches from the egg and gives rise asexually to other larval forms
Derived Forms
miracidial, adjective
Word Origin
C20: New Latin, via Late Latin miracidion, from Greek meirax boy, girl
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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