syntactics as in syntax in linguistics?
ANSWER:
Here is a link to a free online version of the Merriam-Webster dictionary:
http://www.m-w.com/
There you will learn that syntactics is a specialized term in linguistics (different from "syntax") and that it is a branch of semiotic. You can check the increasingly complex definitions at the M-W site and then, if you need additional information, use a search engine to explore syntactics further.
Another online dictionary site that will provide a variety of explanations from a variety of sources is http://www.onelook.com