/ Dictionary / Index M miracidium: Meaning and Definition of Find definitions for: mi•ra•cid•i•um Pronunciation: (mī"ru-sid'ē-um), [key] — pl. -cid•i•a the larva that hatches from the egg of a trematode worm or fluke. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mirabilite miracle Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language