reckoner

[ rek-uh-ner ]
/ ˈrɛk ə nər /

noun

a person who reckons.
Also called ready reckoner. a collection of mathematical and other tables for ready calculation.

Origin of reckoner

Middle English word dating back to 1175–1225; see origin at reckon, -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for reckoner

  • I'm no reckoner of time, that keeps its own score like an innkeeper, without my help.

    Montezuma's Daughter|H. Rider Haggard
  • Grandmother was talkative, and she said: 'Go, Nastenka, into my bedroom and bring me my reckoner.'

British Dictionary definitions for reckoner

reckoner

/ (ˈrɛkənə) /

noun

any of various devices or tables used to facilitate reckoning, esp a ready reckoner
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012