different between quinquagenarian vs octogenarian

English

Etymology

From Latin quinqu?g?n?rius (“containing fifty”), from quinquegeni (“fifty each”), from qu?nqu?gint? (“fifty”) +? -an.

Adjective

quinquagenarian (not comparable)

1. Being between the age of 50 and 59, inclusive.
2. Of or relating to a quinquagenarian.

Translations

Noun

quinquagenarian (plural quinquagenarians)

1. One who is between the age of 50 and 59, inclusive.

Translations

Coordinate terms

• vicenarian
• tricenarian
• quadragenarian
• sexagenarian
• septuagenarian
• octogenarian
• nonagenarian
• centenarian

Related terms

• quinquagenary

English

Etymology

From French octogénaire (from Latin oct?g?n?rius (“containing eighty”), from oct?gint? (“eighty”)) + -ian.

Adjective

octogenarian (not comparable)

1. being between the age of 80 and 89, inclusive

   Coordinate terms: vicenarian, tricenarian, quadragenarian, quinquagenarian, hexagenerian, sexagenarian, septuagenarian, nonagenarian, centenarian

2. of or relating to an octogenarian

Translations

Noun

octogenarian (plural octogenarians)

1. One who is between the age of eighty and eighty-nine, inclusive.
   • 1929, Robert Dean Frisbee, The Book of Puka-Puka (republished by Eland, 2019; p. 75f; emphasis in original):

     Mama was by no means the only grandma present, for the octogenarians had turned out en masse from their huts and lean-tos and were paddling about, diving and splashing as unconcernedly as though they really belonged in the sea rather than on land.

   • 1951, IBM Corp., Proceedings, Computation Seminar (page 13)

     To replace logarithmic tables with natural tables required some time. This seems like a modern age, yet I am not an octogenarian and I can remember the dying gasp of the logarithmic table as the standard method of computation. I have seen the desk calculator become a necessary instrument for every scientist who is doing quantitative work.

Translations

Coordinate terms

• denarian
• vicenarian
• tricenarian
• quadragenarian
• quinquagenarian
• sexagenarian
• septuagenarian
• nonagenarian
• centenarian