文学 语义学 释 meta-language 元语言 用来描述或指称语言的语言或符号。又称纯理语言、符号语言。与对象语言（object language）相对。
metalanguage 元语言
＞数理逻辑与数学基础＞证明论＞释义 metalanguage 元语言 metalanguage 元语言†
系统软件 语言与编译 释文 meta language 元语言
- pico satellite
- picosecond
- pico second chemistry
- picosecond photochemistry
- picoxystrobin
- picric acid
- picrinine
- picrite
- pictest
- Pictet crater
- Pictet Spengler isoquinoline synthesis
- Pictet-Spengler isoquinoline synthesis
- pictogram
- pictograph
- pictographic character
- pictographic numeral
- pictographic stone
- picto-line map
- picto-phonetic character
- pictophonetic method
- Pictor
- pictorial
- Pictorial Archives of the Republic of China
- pictorial (collection)
- pictorial diagram