† disˈreckon,v.Obs.rare. [dis- 6.] intr. To reverse reckoning; to reckon by deduction. 1561Eden Arte Nauig. ii. vi. 31 The dayes of the Moone beynge knowen, then vnrekenyng or disrekenynge backwarde, we shall knowe the daye.1611Florio, Scomputare, to disreckon.