E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Climacteric Years
are seventh and ninth, with their multiples by the odd numbers 3, 5, 7, 9viz. 7, 9, 21, 27, 35, 45, 49, 63, and 81, over which astrologers supposed Saturn, the malevolent planet, presided. Hippcrates recognises these periods. (See NINE.)