CSign
I think when someone bullies a person because they have glasses, or wear clothes not "approved" by majority or are short - that's also bullying but the sociological aspects of the larger "ism" aren't there. Those are targeted characteristics based on individual traits, not a collective, institutional bias such as is perpetuated by societal action.
In addition to the personal bullying I described earlier in this thread, I was also bullied based on clothes/boots I had, what I ate, because I was short/physically little <born several months premature> and know I woulda been bullied if I'd gotten the glasses I knew I needed in 8th grade. I spent that whole year trying to be especially invisible to my 8th grade history teacher. His assignments were done this way - he'd write a list of questions on the blackboard which students had to copy and then go back and look in their books for the answers. I couldn't see the board where I sat and so I asked a student sitting next to me <who was one of the few kids who didn't mess with me> , if, after she was done copying the questions, could she hand back her paper and I'd quickly copy the questions from her sheet. She agreed to the arrangement. She had nothing to do while I copied her questions so she just tried to look like she was looking in her book. so I got really good at taking super-quick notes and using some of my own short-hand, which came in very handy in college.
But the point of my story was, based on my experiences I knew I'd also have gotten it pretty bad if I'd gotten the eyeglasses. I waited til 8th grade was done to let it slip that I needed them.
However, the significance of any of those individual experiences and the hurt of that, which I knew all too well - not quite the same as the "power-over" that is audism.