1. (a.) Pertaining to, or designating, the number sixty; proceeding by sixties; sixty years old.

2. (n.) Something composed of sixty parts or divisions.

3. (n.) A sexagenarian.

L Sexagesima boxcar dozen duodecimo eighty eleven fifteen fifty five and twenty fortnight forty four and twenty fourscore fourscore and ten fourteen half a hundred long dozen ninety nonagenarian octogenarian quindecennial quindecim quindecima quindene score septuagenarian seventy sexagenarian sexagenary sexagesimo-quarto sixteen sixteenmo sixty sixty-four sixty-fourmo teens thirteen thirty-two thirty-twomo threescore threescore and ten twelve twelvemo twenty twenty-five twenty-four twenty-fourmo two dozen two weeks twoscore