Cognitive dimensions of notations, design principles for programming languages' syntax

LISP (programming language), perhaps the most well-known example of a homoiconic language

Metaprogramming, a programming technique for which homoiconicity is very useful

Reification (computer science)

image homoiconicity

define homoiconicity

wikipedia homoiconicity

weblio homoiconicity

kotobank homoiconicity

jisho homoiconicity