Is this Considered child abuse. If so Who should I talk to?

Is it considered child abuses If your mom is constantly yelling at you and telling you how stupid and horrible you are, and saying, and calling you stuff like, *****, Retard, idiot, and saying stuff like you make me sick, **** you, I ******* hate you, can you ever do anything right, no one likes you, you are a terrible person, even a two year old can do this, you disgust me, all you ever do is lie. As well as occasional hitting and threatening me when she gets angry. I obviously know this is not a supper harmful case of child abuse, since when she is not angrey she is like any other loveing mom, but it is starting to make me feel somewhat depressed and stressed. Last week she tried to push me out our window and throw her kindle at me. Is this considered child abuse, also I really want to talk to someone and I trust 2 of my teachers. Would it be weird if I went and talked to one of them about this, I am really stressed and want to talk to someone about it. If I did this would they have to tell the school principal and counselor, because I would not want them to report this because I don't want to make this a big deal. All I Really want is to talk to someone who is older than me my friends, we are only 14 and don't have much experience with dealing with life. If you were my teacher would you talk to me.
Added (1). When she went to push me out the window it was because I was trying to move the couch to switch the two couches so the smaller one is by the window (that is the way she said that she liked it). And when i was moving the smaller one by the window she got mad and said "I swear to god if you dont put this back You are going to regret it" and then I said "this is the way you said you liked it". And she got mad and pushed it with me behind it as hard as she could into the window.

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