Found:

Word Formation Rule

MORPHOLOGY: a rule of grammar by which morphologically complex words are formed out of (free and/or bound) morphemes. Word formation rules are necessary in theories which assume that the lexicon only contains a set of underived words, and that complex words are derived from these listed forms.

LIT.	Aronoff, M. (1976) Halle, M. (1973) Spencer, A. (1991)