Wow, this one had several meanings I was unaware of. I ran the word through Google Images--well worth doing, as many of the pictures are better, but too big to put here.

"2. A fishing net having three layers."


"3. An instrument for drawing ellipses."


This was the only other one I could be sure of:


Also: "From Old French tramail, from Latin tremaculum, from tres (three) + macula (mesh)."
I've heard of macular degeneration; do we have mesh in our eyes?

And, in "[the ban on cigarette sales at Boston drugstores and on college campuses] does trammel on businesses' right to sell...", is the word on extraneous?