Well, I just found myself doing a google search for disjunct, and the third entry is (at present) a link to a page intending to be a definition of Disjunct on mathworld.wolfram.com
However, since there is no definition of the simpler term, here is the next most useful page (which does define mathematical disjunct—the conjunction of a thing and it's opposite), Disjunctive Normal Form.
I hadn't noticed the Wolfram link before...perhaps it only became conspicuous because I'd recently been discussing him?
