reckonmastern.
/ˈrɛk(ə)nˌmɑːstə/, /ˈrɛk(ə)nˌmastə/, U.S. /ˈrɛk(ə)nˌmæstər/ rare (historical in later use).
A mathematician; an arithmetician; an accountant.
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the world > relative properties > number > mathematical number or quantity > [noun] > one who works with numbers
accountera1400
arithmetician1557
reckonmaster1570
computator1591
summer1598
computer1613
counter-castera1616
computant1621
accountant1622
logistic1633
numerist1646
cipherera1648
arithmetic1652
computor1669
figure-caster1831
cruncher1971
1570 J. Dee in H. Billingsley tr. Euclid Elements Geom. Math. Præf. sig. *ij The common Logist, Reckenmaster, or Arithmeticien..imagineth lesse partes: and calleth them Fractions.
1849 Chambers's Edinb. Jrnl. 3 Nov. 286/1 Herr Löschke gave an account..of an old arithmetical work..by the ‘old Reckon-master’, Adam Rise.
1960 Jrnl. Hist. Ideas 21 28 Master Etienne de La Roche..the author of Larismethique..was an authentic reckonmaster.
1993 Hist. Jrnl. 36 775 The knowledge to compute such a compound discounted prepayment for money due at a future time, however, was not widely diffused in 1575. Some sixteenth-century arithmetics, like that of the Lyonnais reckonmaster Jean Trenchant in 1560, included discussion of the topic.
This entry has been updated (OED Third Edition, June 2009; most recently modified version published online March 2022).
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n.1570