ninetieth means the ordinal form of the number ninety. Lexicurio rates it Rare gem — a strength score of 80 out of 100.
ninetieth is pronounced /ˈnaɪn.ti.əθ/.
Etymology
From earlier ninteth, from Middle English nyntithe; for the modern form, see the etymological notes at twentieth.
adj
- The ordinal form of the number ninety.
noun
- The person or thing in the ninetieth position.
- One of ninety equal parts of a whole.