defective

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de·fec·tive / diˈfektiv/ • adj. imperfect or faulty. ∎  lacking or deficient: dystrophin is commonly defective in muscle tissue. ∎  Gram. (of a word) not having all the inflections normal for the part of speech.• n. archaic or offens. a mentally handicapped person.DERIVATIVES: de·fec·tive·ly adv.de·fec·tive·ness n.

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