WordReference Random House Unabridged Dictionary of American English © 2020
de•re•ism  (dē rēiz əm, dā rā-),USA pronunciation n. [Psychol.]
  1. Psychiatryautism.
de′re•istic, adj. 
de′re•isti•cal•ly, adv. 
  • Latin dē rē, literally, away from the matter + -ism

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