12 letters · 13 points in Scrabble
noun someone whose age is in the nineties
adjective being from 90 to 99 years old
originFrom Latin nōnāgēnārius (“containing ninety”) + -an (suffix forming adjectives and representative nouns), either directly or via French nonagénaire, from nōnāgēnī (“ninety each”) + -ārius (“-ary”), from nōnāginta (“nine tens, ninety”).
Etymology from Wiktionary, CC BY-SA 3.0