sex-, sexi-, sext-
(Latin: six, sixth; a word element for number 6)
Don't confuse this sex- with another one that refers to "mating" or "gender".
Sixty years old or sixty to sixty-nine years of age.
Sixty years of age; a person of from sixty to sixty-nine years old.; a person who is in his/her sixties.
sexangular (sex-ANG-you-luhr) (adjective), more sexangular, most sexangular
Having six pronounced and visible divergent edges: Maurice had a supply of sexangular bricks which he planned to use to construct a special sitting area in his garden.
Having six fingers and toes.
Having an extra digit (six) on one or more hands or feet.
The state of having six fingers on a hand, or six toes on a foot.
A six-year-old child.