The seqq meaning is "the following," but the actual spelling is as an abbreviation: seqq. Like its related word, "seq," it makes words like "sequential," "sequiturs," and "sequences." The additional "Q" makes the seqq definition plural. The most common usage for seqq. is in citations in academic writing. In that milieu, its form is usually et seq., with one "Q" instead of two. Generally, it means that a further listing of references will follow a cited reference. In that regard, it's sort of like "see also." A good example would be, "... Volume 1, page 647, et seq.," when another related reference would follow page 647.