eighty-oneth
adj/ˌeɪti ˈwʌnθ/
Etymology From eighty-one + -th (ordinal suffix).
1
Nonstandard eighty-first
- If the diameter of the moon were the same as that of the earth, a body weighing one pound on the earth would weigh only one eighty-oneth part of a pound on the moon.1907, Garrett Serviss, The moon: a popular treatise, page 35:
- Synonyms
- eighty-first