Synonym(s):

• infinite class
• open class
• open list
• open system

Source(s):

CRYSTAL 200158
HARTMANN & STORK 1972158
LYONS 1971436
RICHARDS etal. 1992256
MATTHEWS 198161

• CRYSTAL, David. (2001) A Dictionary of Language, 2nd Ed Chicago: University of Chicago Press.
• HARTMANN, R.R.K. & STORK, F.C. (1972) Dictionary of Language and Linguistics. London: Applied Science Publishers.
• LYONS, John. (1971) Introduction to Theoretical Linguistics. Cambridge: University Press. 
• RICHARDS, Jack, PLATT,  J. & WEBER,  H.  (1992) Longman Dictionary of Language Teaching & Applied Linguistics. London: Longman.
• MATTHEWS, P.H. (1981) Syntax. Cambridge: Cambridge University Press.