/ Dictionary / Index M microfilaria: Meaning and Definition of Find definitions for: mi•cro•fi•lar•i•a Pronunciation: (mī"krō-fi-lâr'ē-u), [key] — pl. -lar•i•ae the embryonic larva of the nematode parasite Filaria or of related genera, esp. of those species that cause heartworm in dogs and elephantiasis in humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microfilament microfilm Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language