Derived from the from lolita complex - from Nabokov's novel "Lolita". Lolicom is non-standard, lolicon is preferred (due to the phonology of Japanese allowing for n-endings but not m-endings).
1) (Noun) (Japanese usage) Someone who is attracted to prepubescent girls; a
paedophile.
2) (Noun) (Western usage) Hentai (Anime/manga
pornography) depicting prepubescent girls.
Note: often the term "lolicom" (like related terms) is misused to refer to pornography of/
attraction to infant, adolescent, etc. girls. Strictly speaking, however, the term refers only to prepubescent girls (primarily ages 4-12)