unknown quantity

Pronunciation:			un'nown 'kwântitee
	Sponsored Links:
WordNet Dictionary
	Definition:		[n]  a variable whose values are solutions of an equation [n]  a factor in a given situation whose bearing and importance is not apparent; "I don't know what the new man will do; he's still an unknown quantity"
	Synonyms:		unknown
	See Also:		factor, variable