Definition of "sexagenary" []

• Relating to or proceeding by sixties. (adjective)
• Sexagenarian. (adjective)
• A sexagenarian. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."
• "I am with the sexagenary of White's, et de cette maniere je passe le temps assez tranquillement."
• "Years are reckoned either from the beginning of the reign of the emperor, or from their place in the cycle of 60 years. the sexagenary cycle was devised by Ta-nao, minister of Hwang-ti, the sixty-first year of whose reign (2637 B.C.) was taken for the first cyclical sign."