postposition
A grammatical term for a word or particle that comes after the noun it governs, such as Japanese case particles (が, を, に, etc.). Contrasts with 前置詞 (preposition).
See also: 前置詞
Japanese particles like が and を are a type of postposition.
A postposition is a word placed after a noun.
Compound of 後 (after) + 置 (place) + 詞 (word/part of speech), literally 'after-placed word'. A calque from Western grammatical terminology.