1) census (among the Romans, denoting a register and valuation of property in accordance with which taxes were paid), in the NT the tax or tribute levied on individuals and to be paid yearly. (our capitation or poll tax)
2) the coin with which the tax is paid, tribute money
Part of Speech: noun masculine
Of Latin origin; properly an enrolment ("census"), that is, (by implication) a tax: - tribute.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root κῆνσος; click on the second column to search for that grammatical form of the root κῆνσος; click on the third column to search for that word and grammatical form; click on the total to search for the root κῆνσος.