sextagenarian

As nouns the difference between terms and sextagenarian

is that terms is while sextagenarian is .

As nouns the difference between sextagenarian and sexagenarian

is that sextagenarian is misspelling of lang=en while sexagenarian is a person who is 60 years old or between the ages of 60 and 69.

As an adjective sexagenarian is

being between the age of 60 and 69, inclusive. In one's seventh decade.