The Collaborative International Dictionary of English v.0.48:

Macrology \Ma*crol"o*gy\, n. [L. macrologia, Gr. ?; ? long +
   lo`gos discourse: cf. F. macrologie.]
   Long and tedious talk without much substance; superfluity of
   words.
   [1913 Webster]

The Jargon File (version 4.4.7, 29 Dec 2003):

macrology
 /mak?rol'@?jee/, n.

    1. Set of usually complex or crufty macros, e.g., as part of a large system
    written in LISP, TECO, or (less commonly) assembler.

    2. The art and science involved in comprehending a macrology in sense 1.
    Sometimes studying the macrology of a system is not unlike archeology,
    ecology, or theology, hence the sound-alike construction. See also 
    boxology.


The Free On-line Dictionary of Computing (30 December 2018):

macrology

   /mak-rol'*-jee/ 1. Set of usually complex or crufty macros,
   e.g. as part of a large system written in Lisp, TECO, or
   (less commonly) assembler.

   2. The art and science involved in comprehending a macrology.
   Sometimes studying the macrology of a system is not unlike
   archaeology, ecology, or theology, hence the sound-alike
   construction.  See also boxology.

   (2003-09-02)