Adjective
metasyntactic (not comparable)
(linguistics, computing) Used in describing syntax; relating to metasyntax.
Any symbol or word which does not violate the syntactic rules of the language can be used as a metasyntactic variable. Source: Internet
A metasyntactic variable is something that stands for another piece of text. Source: Internet
Czech The standard list of Czech metasyntactic variables is "huhu", "lala", "keke", "koko", "kuku", "fifi", "bubu". Source: Internet
For example, you should use a metasyntactic variable in the documentation of a function to describe the arguments that are passed to that function. Source: Internet
For specifications written in natural language, nonsense words are commonly used as metasyntactic variables. Source: Internet
It is sometimes used as a metasyntactic variable in programming. Source: Internet