Technically:
abusive - "Causing physical injury to another"
yes.
If you knowingly and repeatedly subject your child to the by-products of the smoking habit that you selfishly maintain without regard for your childs health, I would say abso-friggin-lutely. Those who smoke inside their homes without the addition of an increased export circulation system or those who smoke in their cars (especially with the windows rolled up!) definitely apply.
I
garuantee you it would hold up in court if the child suffered some illness that could be simply potentially related to second hand smoke, or if the child had asthma for example.
I'm obviously against it. I just think that your child's health is of utmost importance and if it causes you a little discomfort for your nasty, unhealthy, and stupid (I can say that because I smoked for 7 years!) habit then so be it, suck it up (no pun intended
) and do the right thing for your child's sake.