sexagenary

Sex*ag"e*na*ry, a. Etym: [L. sexagenarius, fr. sexageni sixty each, akin to sexaginta sixty, sex six: cf. sexagénaire. See Six.] Defn: Pertaining to, or designating, the number sixty; poceeding by sixties; sixty years old. Sexagenary arithmetic. See under Sexagesimal. -- Sexagenary, or Sexagesimal, scale (Math.), a scale of numbers in which the modulus is sixty. It is used in treating the divisions of the circle. Sex*ag"e*na*ry, n. 1. Something composed of sixty parts or divisions. 2. A sexagenarian. Sir W. Scott.

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