neuter

Originally a grammatical term, Latin neuter 'neither (of two)', i.e., not of the masculine or feminine gender, is a calque of Greek ουδετερος (oudeteros) 'neither of the two'. (Almost all Latin grammatical terminology are loan translations from the Greek terms. Another Greek term for the neuter gender is μεταξυ (metaksu) 'between'.) The verb neuter meaning 'to castrate' is just over a hundred years old.

Ceci n'est pas un seing.