sixtieth means the ordinal form of the number sixty.
sixtieth is pronounced /ˈsɪksti.əθ/.
Etymology
From earlier sixteth, from Middle English sixtithe; equivalent to sixty + -eth. For the modern form, see the etymological notes at twentieth.
adj
- The ordinal form of the number sixty.
noun
- The person or thing in the sixtieth position.
- One of sixty equal parts of a whole.