"Audism" is now in the American Heritage Dictionary

The American Heritage Dictionary revised the definition of  "audism" even better.

n.

1. The belief that people with hearing are superior to those who are deaf or hard of hearing.

2. Discrimination or prejudice against people who are deaf or hard of hearing.

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audistadj. & n.

Look here: http://ahdictionary.com/word/search.html?q=Audism&submit.x=0&submit.y=0