/ Dictionary / Index A acariasis: Meaning and Definition of Find definitions for: ac•a•ri•a•sis Pronunciation: (ak"u-rī'u-sis), [key] — pl. -ses infestation with acarids, esp. mites. a skin disease caused by such infestation, as scabies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acariasis (Thesaurus) acari acaricide Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language