Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A handbook of mathematical tables used to facilitate computation.

from The Century Dictionary.

  • noun One who reckons or computes: as, a rapid reckoner.
  • noun Something that assists a person to reckon or cast up accounts, as a book containing a series of tables; a ready-reckoner.

from the GNU version of the Collaborative International Dictionary of English.

  • noun One who reckons or computes; also, a book of calculations, tables, etc., to assist in reckoning.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun One who reckons.
  • noun An accountant.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an expert at calculation (or at operating calculating machines)
  • noun a handbook of tables used to facilitate computation

Etymologies

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Examples

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  • "Something that assists a person to reckon or cast up accounts, as a book containing a series of tables; a ready-reckoner." --CD&C

    May 31, 2012