quindecimal

English

Etymology

From Latin quindecimalis, from quindecim (“15”) + -ālis (“-al”), from quinque (“5”) + decem (“10”). Equivalent to quindecim +‎ -al.

Adjective

quindecimal (not comparable)

  1. Based on the number fifteen, base 15.
    • 1834, Dionysius Lardner, Treatise on Arithmetic, Practical and Theoretical, page 17:
      here the system assumes a quinary, or, perhaps more properly, a quindecimal radix, sixteen being expressed by a word signifying fifteen and one; seventeen, fifteen and two, &c.
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