I would definitely call it child abuse when your mom nearly choked you. I would call it child abuse if you are hit with a wooden spoon/shoes/other anywhere besides the thighs, rear, back, or arms, or it causes a mark that stays around for more than an hour. I might call it abusive when your mom goes crazy and it's really scary, depending on how crazy.
I don't know how it's viewed in various places, but here in New York, it's not uncommon to see a parent slap a kid for misbehaving. REASONABALE corporal punishment is legal, at least where I live it is.
Would I call your parents abusive? I don't know. If they only got out of hand a few times, it would be ok to just live with it. If they normally leave marks on you, hit you in places other than the legs, rear, back, and arms, or unreasonably hit you with anything other than an open hand, I would call them abusive.
I am 15 years old. My mother would beat me regularly and unreasonably and leave marks and use threats of suicide, murder (me), damaging my prized items to scare me into silence/submission/compliance, even though I was never a bad child. This continued well after I got bigger and stronger than her, because I allowed her to and didn't fight back. In fact, she still physically assaults me every once in a while with various household items, but it's not too much to handle.
My definition of child abuse is altered and biased, since I was a victim of it myself. If at any time, you feel like you or your siblings are in danger, call a child abuse hotline. There are some hotlines that let you stay anonymous. Keep in mind, if you call someone or report it, there's a chance there will be legal action, court-related things, and you and your siblings might even be taken out of your home.