Reckoner

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Reckoner \Reck"on*er\ (r[e^]k"'n*[~e]r), n.
     One who reckons or computes; also, a book of calculations,
     tables, etc., to assist in reckoning.
     [1913 Webster]
  
           Reckoners without their host must reckon twice.


                                                    --Camden.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  reckoner
       n 1: an expert at calculation (or at operating calculating
            machines) [syn: {calculator}, {figurer}, {estimator}, {computer}]
       2: a handbook of tables used to facilitate computation [syn: {ready
          reckoner}]