adj. of or pertaining to the number sixty; composed of, or proceeding by sixties
adj. sexagenarian
n. sexagesimal
n. sexagenarian
the GNU version of the Collaborative International Dictionary of English
adj. Pertaining to, or designating, the number sixty; poceeding by sixties; sixty years old.
n. Something composed of sixty parts or divisions.
n. A sexagenarian.
The Century Dictionary and Cyclopedia
Pertaining to the number sixty; composed of or proceeding by sixties; specifically, sixty years old; sexagenarian. Also sexagenal.
n. A sexagenarian.
n. A thing composed of sixty parts or containing sixty.
Word Usage
"We may add that the Chinese do not commence their sexagenary cycle, into which they have introduced arrangement, till the reign of the Emperor Iao, two thousand three hundred and fifty-seven years before our vulgar era."