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Meaning of MACRO-

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Computing Dictionary
  1. 1. Assembly language for vax/vms.

    2. pl/i-like language with extensions for string processing. "MACRO: A Programming Language", S.R. Greenwood, SIGPLAN Notices 14(9):80-91 (Sep 1979).

    [jargon file]

  2. A name (possibly followed by a formal argument list) that is equated to a text or symbolic expression to which it is to be expanded (possibly with the substitution of actual arguments) by a macro expander.

    The term "macro" originated in early assemblers, which encouraged the use of macros as a structuring and information-hiding device. During the early 1970s, macro assemblers became ubiquitous, and sometimes quite as powerful and expensive as hlls, only to fall from favour as improving compiler technology marginalised assembly language programming (see languages of choice). Nowadays the term is most often used in connection with the c preprocessor, lisp, or one of several special-purpose languages built around a macro-expansion facility (such as tex or unix's troff suite).

    Indeed, the meaning has drifted enough that the collective "macros" is now sometimes used for code in any special-purpose application control language (whether or not the language is actually translated by text expansion), and for macro-like entities such as the "keyboard macros" supported in some text editors (and pc tsrs or macintosh INIT/CDEV keyboard enhancers).

  3. Prefix large. Opposite of micro-. In the mainstream and among other technical cultures (for example, medical people) this competes with the prefix mega-, but hackers tend to restrict the latter to quantification.

    [jargon file]