Look up 90th in Wiktionary, the free dictionary.
90th is the ordinal form of the number 90. 90th or Ninetieth may also refer to:
- A fraction, 1⁄90, equal to one of 90 equal parts
Geography
edit- 90th meridian east, a line of longitude
- 90th meridian west, a line of longitude
- 90th parallel north, a circle of latitude
- 90th parallel south, a circle of latitude
- 90th Street (disambiguation)