/ Dictionary / Index F filariasis: Meaning and Definition of Find definitions for: fil•a•ri•a•sis Pronunciation: (fil"u-rī'u-sis), [key] — n. infection by filarial worms in the blood and lymph channels, lymph glands, and other tissues, the various species causing skin swellings, blindness, or elephantiasis if untreated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: filariasis (Thesaurus) filarial filariid Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language