thirtieth means the ordinal form of the number thirty. Lexicurio rates it Rare gem — a strength score of 77 out of 100.
thirtieth is pronounced /ˈθɜːti.əθ/.
Etymology
From earlier thirteth, from Middle English thrittithe, threttiþe, thrittyde, from Old English þrītigoþa; equivalent to thirty + -eth. For the modern form, see the etymological notes at twentieth.
adj
- The ordinal form of the number thirty.
noun
- The person or thing in the thirtieth position.
- One of thirty equal parts of a whole.