Definition of reckonmaster in English:

reckonmaster

noun

rare, historical
  • A mathematician; an arithmetician; an accountant.

Origin

Late 16th century; earliest use found in John Dee (1527–1609), mathematician, astrologer, and antiquary. From reckon + master.

Pronunciation

reckonmaster

/ˈrɛk(ə)nˌmɑːstə//ˈrɛk(ə)nˌmastə/