English
reckonmaster
From reckon + master.
Today it means
noun A mathematician or arithmetician.
Sources
Sources: Wiktionary, “reckonmaster”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / reckonmaster