Obs. [UNDER-1 6 b: cf. subdouble s.v. SUB- 10.] = SUBDUPLE. Also † Under-doubled ppl. a. Obs.
c. 1430. Art of Nombryng (E.E.T.S.), 16. It shewithe that a nombre componede was the quadrat, and his rote a digit last founde with vnder-double other vndirdoubles. Ibid. Neþer to sette the doublede forwarde nether the vnder doublede.
