metalanguage

n [C, U] language or set of symbols used in talking about or describing another language, etc 元语言, 纯理语言（用以讲述或描述另一语言等的语言或一套符号）.

mesmerism, mesmerist, mesmerize, mesemerise, Mesopotamia, mess, message, messenger, Messiah, Messieurs, Messrs, messy, Met, meta-, metabolic, metabolism, metabolize, metabolise, metacarpal, metacarpus, metal, metal-pointed, metallic, metallurgy, metalwork, metalworker, metamorphose, metamorphosis, metaphor, metaphorical, metaphorically, metaphysical, metaphysics, metatarsus, mete, meteor, meteoric, meteorite, meteorological, meteorologist, meteorology, meter,