Wiktionary
eighty-third
n. (context fractional English) One of eighty-three equal parts of a whole. num. (context ordinal English) The ordinal form of the number eighty-three, describing a person or thing in position number 83 of a sequence.
Usage examples of "eighty-third".
Recreational boaters on the Potrum River who happened to be looking in the right direction at the critical moment were later able to report that they had definitely seen a large, glittering device erupt from the eighty-third floor of the Cheimer building, pause to hover in midair while raining fragments of shattered lucinite on the street below, and then ascend into the heavens.