nonagenarian
Pronunciation:
/ˌnɒnæd͡ʒɛˈnɛːɹɪən/noun
Definitions
One who is between the age of 90 and 99, inclusive. One who is in his or her tenth decade.
adjective
Definitions
Being between the ages of 90 and 99, inclusive. In one's tenth decade.
Of or relating to a nonagenarian.