twelfth
Longman Dictionary of Contemporary English 5++LDOCE 5++twelfth /twelfθ/ noun [countable] one of twelve equal parts of something 十二分之一
Examples from the Corpus
twelfth• Later in the round, on the par-four twelfth, he faced a yard approach shot into a ten-knot wind.• Then on the twelfth, a 316 yard par-four, I had a bit of luck.Origin twelfth Old English twelfta, from twelf; → TWELVEtwelfth nounChinese
equal of of something one parts twelve Corpus
See twelve for more

