| CATENARIAN | • catenarian adj. Catenary; like a chain. • CATENARIAN adj. of or pertaining to chains. |
| CENTENARIAN | • centenarian n. One who or that which is at least 100 years old. • centenarian adj. Aged 100 years or more; extremely old. • centenarian adj. Of or relating to centenarians or a centenary celebration. |
| MILLENARIAN | • millenarian adj. (Christianity) Pertaining to the belief in an impending period of one thousand years of peace and righteousness… • millenarian adj. Pertaining to any of various religious or social movements which believe in a coming radical change… • millenarian adj. Lasting or expected to last a thousand years. |
| NONAGENARIAN | • nonagenarian n. Synonym of ninetysomething: a person between 90 and 99 years old. • nonagenarian adj. Of or related to ninetysomethings. • NONAGENARIAN n. a person whose age is in the nineties. |
| OCTOGENARIAN | • octogenarian n. Synonym of eightysomething: a person between 80 and 89 years old. • octogenarian adj. Of or related to eightysomethings. • OCTOGENARIAN n. a person whose age is in the eighties. |
| POSTMILLENARIAN | • postmillenarian n. One who believes in postmillennialism. • POSTMILLENARIAN n. a believer in postmillennialism. |
| PREMILLENARIAN | • premillenarian adj. Premillennial. • premillenarian n. Premillennial. • PREMILLENARIAN n. a believer in the premillennial coming of Christ. |
| QUADRAGENARIAN | • quadragenarian n. Synonym of fortysomething: a person between 40 and 49 years old. • quadragenarian adj. Of or related to fortysomethings. • QUADRAGENARIAN n. a person who is forty years old, or between forty and fifty. |
| QUINQUAGENARIAN | • quinquagenarian n. (Obsolete, rare) Synonym of pentecoster: an officer who commands 50 men. • quinquagenarian n. Synonym of fiftysomething: a person between 50 and 59 years old. • quinquagenarian adj. (Obsolete, rare) Of or related to command over 50 men. |
| SEPTUAGENARIAN | • septuagenarian n. Synonym of seventysomething: a person between 70 and 79 years old. • septuagenarian adj. Of or related to seventysomethings. • SEPTUAGENARIAN n. a person whose age is in the seventies. |
| SEXAGENARIAN | • sexagenarian n. Synonym of sixtysomething: a person between 60 and 69 years old. • sexagenarian adj. Of or related to sixtysomethings. • SEXAGENARIAN adj. aged between sixty and seventy years old. |