"not thirtieth." There really isn't a precise single-word antonym for it.
Thirtieth.
The thirtieth sultan of the Ottoman Empire was Mahmud II.
Thirtieth means being one of 30 equal parts. So one thirtieth is 1/30 and 1/30 as a decimal is 0.0333...
Thirtieth.
adjective
The correct spelling for 30th is "thirtieth".
Words that rhyme with "thirtieth" include words like "sixtieth," "edith," and "beneath."
winscosin.
0.56666 repeating
thirtieth
Thirtieth.
The thirtieth week of calendar year 2011 starts on Monday July 25 and ends on Sunday July 31.