"Antipous" has been used as a singular form of the word in some 19th-century works [0]. [0] https://en.wiktionary.org/wiki/antipous#English https://en.wiktiona

"Antipous" has been used as a singular form of the word in some 19th-century works [0]. [0] https://en.wiktionary.org/wiki/antipous#English https://en.wiktionary.org/wiki/antipous#English