Nine″ti‐eth, n. 1. The quotient of a unit divided by ninety; one of ninety equal parts of anything.
2. The next in order after the eighty-ninth.
Webster's Dictionary 1913
Nine″ti‐eth, n. 1. The quotient of a unit divided by ninety; one of ninety equal parts of anything.
2. The next in order after the eighty-ninth.